Yeah that's a perfect substrate setup for a ri. Not trying to be rude just help you. if you have potted plants put large clean river rocks or screen over the dirt. Also removing the substrate will help with drainage
I'm always glad to see people asking questions before doing things.
This caresheet has reliable info about Jackson's, although I use calcium dust without D3 every other feeding, with D3 1x a month and multivitamin powder 1x a month--more often than that is too much. https://www.chameleonforums.com/care/caresheets/jacksons/
Petstores very often give advice to do things that can actually harm your chameleon, so you'd be wise to have a look at the caresheet and ask questions.
As for keeping a pair of Jackson's together--people here don't do it because it would require a ridiculously large custom built cage in order to keep both chams happy--so people keep them separately in easier to manage but still large sized cages.