@LunaLovegood ...I don't want to discourage you from getting a chameleon but I do want you to have enough knowledge to succeed if you decide to get one. From the questions you are asking now, you are not ready yet because you don't have enough knowledge to be successful yet. This is a good place to learn...so keep asking questions and reading information on this forum about them before you finally decide. Bearded dragons are a good choice too though.
You said..."I heard that they can turn blue and red and orange which is really cool. Do Jackson's have a wide range of colors?"...Jacksons are basically green although they do some light green mixed with dark green patterns and a few have a yellowish green sort of stripe down their sides. Each kind/morph of panther has a different range of colors it can do...so they can't all do all colors. Part of the chwmeleon's color changing is a "language"....they express their emotions and " tell" you when they are gravid or angry or hot or cold, etc by their colors and posture.
Here's some information to get you started...
Female veileds or panthers can be more difficult to keep because both can suffer from reproductive problems. How you feed them and keep them is more critical than for males. Both can lay (infertile) eggs without having a mate. You will more than likely have to deal with egglaying if you get a female veiled or panther.
Most chameleons don't seem to like being handled but some will tolerate it. Some won't tolerate it at all. It seems some look at us as a safe tree to sit on sometimes.
Your temperatures have to be proper in the basking area and the other areas of the cage. They need proper temperatures to help them digest their food.
You need to mist them and set up a dripper for them so they can get the water they need.
You need a UVB bulb so they can produce the D3 they need to use the calcium in the system. You need to dust the insects with a phosphorous-free calcium powder and other powders and feed/gutload the insects to provide the proper nutrients for the chameleon.
They need lots of plants in the cage to hide in and branches to climb on. Plants need to be non-toxic and well washed...both sides of the leaves.
Female veileds and panthers need an egglaying bin in their cages once they are mature.
There is lots more to learn than just this!
Here are some good links with good information to get you started including some from this site....
http://www.chameleonnews.com/Home.html
https://www.chameleonforums.com/thr...-like-how-it-happens-and-how-to-fix-it.95071/
https://www.chameleonforums.com/threads/supplementation-mbd-1.2451/
https://www.chameleonforums.com/threads/laying-bin-set-up-educational-video.77225/
https://www.chameleonforums.com/threads/quarantine.36078/
BTW..the care for bearded dragons is quite similar for feeding, supplementing and feeding/gutloading the insects but they need veggies and greens in addition to the insects and need different basking temperatures and different humidity and watering methods.
Hope this helps!