Congratulations on your decision to take the first step and ask questions about electronic cigarettes. I personally smoked for 30 years and have been vaping now for 9 months.
Personally, I started out with one of those 808 type two piece ecigs that look like a cigarette sort of, and you have to charge them like every 1 1/2 to 2 hrs and buy several of the batteries to get through a day, plus they cost alot more than other starter kits where the battery lasts most of the day and which also has a stronger vape and better throat hit.
I think an EGO and KGO are great to start with, and I have been recommending KGO's to my friends that have started vaping. Mainly because the KGO's have a stronger battery, but look pretty much the same as an EGO. No, I do not sell KGO's or EGO's or anything else for that matter. BUT...since you mentioned you would like to also have a passthrough type device, you would be better with an EGO probably, which is what most newbies seem to like. Just google it and find a vendor with a decent price. A starter kit will cost you about half the price of an 808 kit, and the battery will last you most of the day, plus you can use it as a passthrough as well. You should also get maybe a 5-pack of single coil 2 ohm cartomizers to go with it and a drip tip. I got my friend set up with all of that for about $60, and then try finding a tobacco or menthol juice (whatever you prefer).
I feel somehow the need to advise you to be careful of possible advertising in here for sites and products that might not be the best choice; however, I'm sure some people don't mean to advertise. That's why I'm not advising which site to get one from because I don't want you to think I'm pushing a product to make a profit. EGO's and KGO's are sold by numerous vendors
Best of Luck to You!
I wish you luck!