Yea you need to do some serious research.
Ohms law
Batteries
Mods
Kanthal wire
Do not try vaping below 1 ohms unless you know what you are doing.
You need to know what your battery can handle.
You need to understand the dynamics if kanthal wire.
Ohms law, ohms law, ohms law!!!!!!!!
Last but not least, know your mod. Chrome plated, telescopic, china clones for the most part will not fit the bill. Too much current through a cheap switch isn't good. Things melt and short out.
I'd say with your V5 build 2 coils around 3 ohms x 2 will put you around 1.5 ohms. Make sure both coils are exactly the same resistance. 34 to 32g kanthal would be my suggestion on wire size for that build.
As you get more experience, knowledge and better gear you can go lower and lower...and not take your face off.
Last note, short out your ohm meter. There will be a natural resistance on your wires. It won't show 0 you you will have to deduct that from the measured total. Unless you have an analog meter which will have a ohms 0 adjust.