I am a Photoshop user but cannot think of a course or set of videos. I got started with this by reading up on it in a book by Martin Evening. I probably still have the CS2 and CS4 books lying around somewhere. I found these to be pretty good for me, but it may not be the best way to go for you. I see he also has a Lightroom book out:
https://amzn.to/3EF2nCO
I have not used Lightroom a lot. I am more a Photoshop fan. Lightroom is easier for larger sets of photos, especially when combined with RAW conversions, as it also includes some photo browsing options and management functions as well as the option to store preset combinations of edits (if I remember it correctly). Photoshop is more a one photo at a time approach and includes a lot of options that are more about editing than tweaking colours and such.