Most places have a discount on your first purchase. I've used Dicount Vapers and been very happy with them so haven't shopped around. However, I was so intent on getting that first order in, I missed the discount code, lol. There are also coupons on this site I think too. Now that I'm looking for them I can't find them. 20%-30% off a kit is worth it though. Good luck in your quest!
24 or 32mg juice; regarding kits, you'll probably want to get at least two batteries; if you're getting an ego-style setup (like what I linked to), the battery is already its own holder, and includes the connector to the tank/atomizer.
Totally ideal would be if you could locate a nearby brick&mortar vendor and sample the juices they sell; I believe you mentioned disability, so this may not be practical. I'd note that there are several new-to-vaping pitfalls most fall into; getting cig-a-likes (thinking they should be using something that -looks- like a cigarette), and starting with tobacco-flavors (because they think that's what they like about smoking) - those are the two most common, I think.
Barring the brick & mortar, searching fasttech - or whoever - for 'ego batteries' will get you a battery that will interchangeably work with pretty much anything you can throw on top of it. Get two of those, and a 'clearomizer', or 'bcc tank'. A usb or wall charging cable for 'em as well. That's the basic setup to be able to somewhat continuously vape.
How can you possibly respect a person who can only think of one way to spell a word? - Andrew Jackson (paraphrased)