If you have actual pre-filled carts or the material that goes in them, then currently your best bet is to buy a Trinity tank from Uptech and get a syringe from somewhere and pull material from the pre-filled cart or whatever the source material is in and fill the Trinity tank instead.
All the other pre-filled and disposable carts are garbage it seems.
For battery options...just get a Mod Box so you can adjust and read the settings.
They leak and most have cotton in them. I recommend you read the last two or three pages in the Persia thread and all of the 2 page Terpene Beginner thread. I have included links for these two threads. There will be a lot of information in those 5 pages of reading and only half of it applys to you probably and 90% of that is going to seem like its above your head. Been there too. Just read it 2 or 3 times if need be.