Ninja V+ setup resources?

I have done a fair number of smaller videos with a webcam and or screen capture, editing mostly in Camtasia. I'm now trying to shoot better looking videos (mostly talking head stuff for YouTube). I have access to a Canon R5 and a Ninja V+. Shot a couple of tests and quickly realized that I have issues with my normal workflow. The internal Canon files can't be opened by... anything, really. The Ninja files have no audio in Camtasia (but have audio and video in VLC).

I feel like the Ninja is the correct path, since I have it, hard drives are cheaper than cards, and also they at least open in VLC. But there are a lot of options in the Ninja for file types, codecs, color spaces, etc. There doesn't appear to be a manual, at all, for the thing. I suspect I am asking:

1) does anyone have suggestions for communities/websites/etc where one can get an early intro to the editing toolchain? This would be for real learning so I could e.g. select a color space for a reason.

2) does anyone happen to know of a tutorial/post/etc that would get me editing my files in Camtasia in, say, an hour of effort? This would be less learning and more "push the buttons they say to push," and get some content created.

3) do I need to just give up on Camtasia, and if so, what should I be using?