Hi Nora, welcome.
I will agree with everyone here that you are so much better off switching to different vape equipment and having something durable, inexpensive (comparitavely) and easier to handle, once you get over the initial hump.
Even IF big tobacco wasn't making junk, I'd be unlikely to support their efforts, given that they're designed to fail. (IMO only.) I think BT makes overly expensive, unreliable products so that people will give up on vaping and switch back to smoking, I'm glad you found this site.
If you enjoy a tight draw and MTL smoking (which is usually what you'll get with cigalikes (I'd suggest the Nautilus 2 with medium airflow, and 1.8 coils, though I did put in the 0.7 coil yesterday in disgust when a subpar coil I had started leaking badly. I only increased my watts to 15, and was pleasantly surprised at how well it vapes, with 100% VG juice, (allergic to PG), it vapes MUCH more smoothly.
But, that's the nice thing about your own equipment. Once you find something you like, you won't worry about a dud coil, leaking (as you can buy your own e-juice or even make it) and it will be less expensive to play around with things...
I'd say read up on some of the pinned threads, that have a lot of information, and get recommendations for starter batteries. Given what you were using, you may want to start with a single battery that you charge via USB, though I'm quite happy with my IPV-5, though it's larger and ugly as sin (LOL, some of my vape equipment was a gift).
Good luck and happy vaping! It's just a guess, but I'm thinking Brother Bob will see this and post some links for you, he is kind enough to do that for most questions, but you can get started yourself, and if you have access to a vape shop it can be nice to look at/handle if there's a demo model, and actually *see* your options, and find something you like (even if you don't purchase from them but buy online if it's less expensive).
Good luck and Happy Vaping!
Anna