Ok next you need these things:
A good working knowledge of ohms law but here is a helpful tool.
Ohm's law | Steam Engine | free vaping calculators
Practice battery/mod safety. Use only batteries designed for this and never exceed their amperage rating, over charge them or try to revive a dead battery with what some folks call a battery defibrillator. Screw up and you could have a bad day.
An Ohm meter you can trust. Here is an explanation of what happens with multiple coils in parallel.
View attachment coilsv2.pdf
Other tools, Tweezers, maybe needle nose pliers, something to wrap the wire around I use and inexpensive metric drill bit set, flush cut wire cutters or a flat finger nail clipper, and misc. tools like small screwdrivers and Allen wrenches.
Shoot for IMO standard built coils between 5-10 wrap and with an Inside diameter between 2-3 mm.
I again caution you when building test the resistance before firing it up and use the ohm meter. If you have a short or to low a resistance you could cause a battery to vent or worse.
If you have any questions do not hesitate to ask as there are not stupid questions, except for the ones you don't ask. Feel free to PM me if you need help.