Great to hear you’ve been doing your research!
For room placement, and you’ll want to try and get a room with low traffic. I know some people just can’t put their chameleon there and that’s ok, but I would definitely try. Mines in our sunroom, which not many people go in when we have guest come over.
My chameleon, Gatsby, is a panther chameleon that I purchased from Kammerflage Kreations. They were awesome in helping me before buying him. Gatsby is thriving and was perfectly healthy when I received him! decided to go with kammerflage because I’ve heard so many great things about them. And I have all good things to say myself!
Something else that I would suggest is to setup your enclosure a week or so before recording your chameleon. Expect things to go wrong and to be stressed when you receive him!
Overall, good luck! And I hope this helped you out!