The Ready State Virtual Mobility Coach is like having a virtual Kelly Starrett in your pocket.
Are you squatting in a flat shoe? Allstars, DC or any skate shoe are good options.
Have you looked up/down stream of your knee to feed slack to the system?
Carl Paoli has an excellent set of progressions on the Cody app Freestyle Move Strong 1. It takes the skill from base level and builds positioning. I’ve used it with a few people with great results.