Welcome aboard
The aspire zelos is a pretty good kit for a starter - battery is decent and if you are enjoying using it - that is the key.
I started on an innokin endura t18, went up to the endura t22 and got thru two months of vaping with those two kits. The t22 is similar to the zelos, just has a bigger tank.
I agree as a beginner its better to have an uncomplicated kit that just works well. After 3 months I got an external battery mod - just means I charge individual batteries instead of the whole mod. Also means I don't have any downtime while a spare battery is charging. I'm now using that with the innokin t22 tank.
I'll let the other more experience members advise you on what to get

Good luck with quitting