You could purchase the proper lighting lighting, a green screen and shoot your footage with a first class camera.
And still have green fringing and pixilation around you. Plus, unwelcome artifacts in the background.
Remove a color is not a true Chroma Key filter. Which is the industry standard for green screen removal. Even with an actual Chroma Key filter. Achieving high quality results can be elusive. Not all Chroma key filters are created alike.
Here are 2 posts that covering what I’m talking about. There are many more like it.
So, just a heads up.
I'm sure Camtasia for MAC uses Remove a Color as well.
Some people hang black or white backdrops behind themselves. You can rig a stand or purchase a cheap one.Same thing goes for backdrops.
Amazon has lots of large Tapestry's for under $20 with all kinds of muted designs.
Lots of options easier than green screening.
On the other hand, if you shoot against a bookcase or panelled wood wall, your background is boring. But here's a secret: boring backgrounds are what most viewers expect, and what most professional videos use.