You are in no way, shape or form ready to use that mech.
You say you understand, but your questions show me that you really don't.
If you can't calculate, build for yourself the correct coils for your gear that is sign NUMBER ONE that you aren't ready for a mech.
I'd suggest some time spent reading on the rebuildable atomizer forum, so you can figure out how to build coils (I'd recommend as starting places a coilmaster kit that comes with an ohm's reader and pretty much everything you need to get started. Also, check out steam-engine.org to figure out how to build to the right resistance.
Also, if I ever asked a vape store to build my coils for me and then expected to rely on THEM for MY MECH?????????????? No, no no. They may have done a fine, or a terrible job but it is your hand and face that would be affected if it's the later.
You can't successfully vape a mech in the method you are proceeding. It's just not safe, period. You also don't appear to comprehend the things people are telling you about your current battery as you continue asking about it.
Start on a regulated mod like almost anyone does these days. Mechs can be a great vape.... with some experience under your belt.
You just aren't ready, please accept it and get something a little easier to deal with, heck, use your RTA, just do it on a regulated mod, and learn how to build and get safe batteries first. Your mech will be there.
Anna