Hey,
Welcome to Vivarium Forums

Okay, you can grow all sorts of tropical plants in PDF(Poison Dart Frog) enclosures. Some common vines include species of Pilea, Philodendron, Dischidea, etc... There are many.
Moss, I myself grow what might be Java Moss, and tropical moss. Both do well under PDF conditions. The trick with moss is lighting.
Humidity, PDF's like 80-100% humidity! Anything less will put your froggy in danger.
Temps, most PDF's like it between 65 and 80. D. pumilio, among a few others I believe, like it between 65-85ish.
Now, I believe that the best begginner arboreal PDF is D. pumilio. The drawback to that is that they are expensive. Then again, they are probably the least expensive of the arboreal species, and the largest of them.
Arboreal species include, D. pumilio, D. intermedius, D. fantasticus, D. imitator, D. reticulatus, and D. variabilis.
Keeping these species you need to grow bromiliads in your vivarium, which these PDF's use as homes and breeding sites.
Now for the most important aspect of keeping PDF's. You must learn how to culture your own food for them. They eat small fruit flies, and springtails. This is the staple diet of all PDF's. They will not eat crickets unless you get true pinheads, and or you have a really big terrestrial PDF like Phyllobates terribilis, or D. galactonotus.
So, your best bet is to build the viv, plant it. Seed it with springtails and other microfauna, learn how to keep and maintain a steady stream of fruit fly cultures, and then choose the best PDF you like.
Really, once you are comfortable that you can provide the correct food, and temps, and home for whatever species you want, you can get any PDF.