I’ve found Darren Mostyn’s videos quite helpful:

https://youtu.be/YbDRl_xugJo

Also Daniel Batal, more in the “tips and tricks” category but very accessible:

https://youtube.com/@daniel_batal

These are both DaVinci Resolve specific. For more general info I found it useful to do some googling around LUTs.

I find the big downside of color grading is it makes you really want a camera that records RAW video.