I'll second looking at the kit Katya just linked. Set up the options of the kit to your taste, the only thing left is just liquid and you are off and running. Liquid vendors in the UK, one of our UK members will have to pipe in here on those. However on liquids, I can pipe in specifications.
I'd suggest a 50 Propylene Glycol/50 Vegatable Glycerin ratio at first, these are your suspension compounds of your liquid, the PG is thinner than VG and transports flavor better and enhances throat hit (harshness of hit) where the VG can sweeten a liquid better and produces more vapor, at 50/50 ratio the liquid won't be to thick or to thin, give decent flavor, a good throat hit, and decent vapor output, or a 70PG/30VG blend which will be a bit thinner with a bit more flavor, little more punch on the throat hit, but a decrease in vapor, however will work real well with a Kanger BC tank without any modifications. Nicotine content is all dependent on your cigarette usage presently. 2 packs a day Full Flavor or Roll Your Owns, 24mg minimum or 36mg maximum would be your start, word of caution, Nic level does give a stronger throat hit the higher the content level. Pack and a half to a single pack a day full flavors would land you about 18mg minimum 24mg maximum. Pack a day Lights, 1/2 pack a day full flavors 12mg to 16mg maximum. Half pack a day of lights or lower 4mg to 8mg.
The T3 tank system suggested is a 3milli-liter tank, a nice system I personally still use on a daily basis. The Evod suggested is a 1.6milli-liter tank system I own a couple as well. Performance wise, they both perform equally well, though later down the road if you find you like the T3, I use them as my go to work system due to capacity, I'd suggest later on looking at the upgraded version the T3S. I use my Evods at home or when out on short jaunts with spare T3's or Evods in my case. They both are easy to maintain, simple rinsing in warm tap water on the tanks and heads every couple tank refills keeps them pretty much clean, about once a week a good soak in vodka or everclear for about 20minutes, then a dry burn to clean up carbon build up off the coils, and a rinse in warm tap water let out to dry will give them longevity. Their mouthpiece is part of the tank so no extra parts to buy there, and if you like both, you can look later on at the Protanks/Protank 2's/Mini Protank/Mini Protank 2 Version 2, which are glass tanks over the T3 and Evod are plastic. The older T3 head is one unit, a solid base, coil head cup, and chimney, the Evod/T3S/Protanks are modular (sepperate base, sepperate coil assembly that attaches to the base), so either buy a couple T3S bases, or T3S tanks. Reason, instead of having to buy 2 or 3 sepperate model coil heads, reduce those replacements to a singly model, in this case the T3S coil head replacements will work in all of Kangers bottom coil systems, or any Tank that uses the Kanger Protank/Evod heads, though Evod and Protank heads will not fit in a T3S or T3 upgraded to a T3S base assembly. Filling and refilling, all Kanger BC are filled the same way, removed the base with the tank upside down, fill along the side between the chimney tube and side up to the top of the chimney stem, reseat and tighten the base and tank together, let sit upright for about 5-15 minutes, pull a couple un-powered hits before doing a powered hit, off and running, if chain vaping, about every 3rd hit redo the un-powered double puff primer.
Good luck, welcome to the forums and community, and best wishes to you on becoming cigarette free, hope the yunguns appreciate what you are trying to do for them
I'd suggest a 50 Propylene Glycol/50 Vegatable Glycerin ratio at first, these are your suspension compounds of your liquid, the PG is thinner than VG and transports flavor better and enhances throat hit (harshness of hit) where the VG can sweeten a liquid better and produces more vapor, at 50/50 ratio the liquid won't be to thick or to thin, give decent flavor, a good throat hit, and decent vapor output, or a 70PG/30VG blend which will be a bit thinner with a bit more flavor, little more punch on the throat hit, but a decrease in vapor, however will work real well with a Kanger BC tank without any modifications. Nicotine content is all dependent on your cigarette usage presently. 2 packs a day Full Flavor or Roll Your Owns, 24mg minimum or 36mg maximum would be your start, word of caution, Nic level does give a stronger throat hit the higher the content level. Pack and a half to a single pack a day full flavors would land you about 18mg minimum 24mg maximum. Pack a day Lights, 1/2 pack a day full flavors 12mg to 16mg maximum. Half pack a day of lights or lower 4mg to 8mg.
The T3 tank system suggested is a 3milli-liter tank, a nice system I personally still use on a daily basis. The Evod suggested is a 1.6milli-liter tank system I own a couple as well. Performance wise, they both perform equally well, though later down the road if you find you like the T3, I use them as my go to work system due to capacity, I'd suggest later on looking at the upgraded version the T3S. I use my Evods at home or when out on short jaunts with spare T3's or Evods in my case. They both are easy to maintain, simple rinsing in warm tap water on the tanks and heads every couple tank refills keeps them pretty much clean, about once a week a good soak in vodka or everclear for about 20minutes, then a dry burn to clean up carbon build up off the coils, and a rinse in warm tap water let out to dry will give them longevity. Their mouthpiece is part of the tank so no extra parts to buy there, and if you like both, you can look later on at the Protanks/Protank 2's/Mini Protank/Mini Protank 2 Version 2, which are glass tanks over the T3 and Evod are plastic. The older T3 head is one unit, a solid base, coil head cup, and chimney, the Evod/T3S/Protanks are modular (sepperate base, sepperate coil assembly that attaches to the base), so either buy a couple T3S bases, or T3S tanks. Reason, instead of having to buy 2 or 3 sepperate model coil heads, reduce those replacements to a singly model, in this case the T3S coil head replacements will work in all of Kangers bottom coil systems, or any Tank that uses the Kanger Protank/Evod heads, though Evod and Protank heads will not fit in a T3S or T3 upgraded to a T3S base assembly. Filling and refilling, all Kanger BC are filled the same way, removed the base with the tank upside down, fill along the side between the chimney tube and side up to the top of the chimney stem, reseat and tighten the base and tank together, let sit upright for about 5-15 minutes, pull a couple un-powered hits before doing a powered hit, off and running, if chain vaping, about every 3rd hit redo the un-powered double puff primer.
Good luck, welcome to the forums and community, and best wishes to you on becoming cigarette free, hope the yunguns appreciate what you are trying to do for them