Hi Whitley,
Do read the link posted thoroughly, it is quite informative.
The glass setup will do for the time being (I got the same thing when I started) but get a digital therm/hydrometer asap. (not much more than $10 at Zellers/Walmart etc.) A basking spot helps your cham get warm enough to digest properly (too cool and it may not eat) but a temp gradient is necessary so it can cool down when it wants. (another reason for a screen cage, a bit larger than what you are using) A branch or vine a few inches from a heat source (40 watt bulb?) will do fine. but make sure you know how warm it is there. (Around 80-83 at the warmest point, with lower areas in the mid 70s)
Jax need a temp drop of around 10 degrees at night to stay healthy, and require quite high humidity. (for now the glass home will help you with that, but seriously consider upgrading in the future. You can always use the glass terrarium for some cute pygmys!)
Some people direct a room fan GENTLY across the top of their cage for airflow, but be careful it's not too strong. (ya don't want to chill your buddy)
Get some calcium WITHOUT D3, and use it as your primary source of calcium. The D3 can be used 1 or 2 times a month. Mountain chams are sensitive to supplementation, so don't go overboard. Also get some Rep Cal Herpavite with beta carrotine (or something similar) to dust with once a month for a vitamin booster.
Easy on the mealworms, they are hard to digest.
Waxworms are high in fat so just use them as a treat.
16" from the floor is too low for your buddy's comfort. They live in trees and like to look DOWN on things. (our cages are at least 6' at the top)
Live plants are a must! Simple pathos work fine and are impossible to kill. They grow fast and can be draped for nice climbing pathways.
Jacksons are sweet! You will get the hang of it soon, and have a ball watching your buddy.
Good luck! Here's 2 of our sweeties for inspiration.