Git resolution/advanced techniques course recommendations?

I use VScode and PHPStorm daily as my IDEs. I've been developing for a few years, but don't feell proficient in using the visual Git GUIs these IDEs provide. Many of my coworkers use GitKraken, but regardless of GUI, I'd like to get more practice/instruction in resolving Git conflicts and advanced Git techniques. Does anyone have any recommendations for courses, specifically with examples or labs? Thanks!