Welcome Domba. Your english is just fine.
There are many good reliable brands to choose from. Aspire,
vaporesso,
lost vape, Innokin, Asmodus just to name a few. These brands have good quality controls in place. Maybe visit the shop and see what feels good in your hand and make it clear you won't put up with a hard sell tactic if they try to pressure you into a purchase. Dual 18650, or dual 2x700
devices will serve you well; make it clear you are only interested in fully regulated devices as well. If you like a couple come ask about those mods. Good luck on your journey to quit smoking.