In my experience, just consuming more media is a good way to become more familiar with the facial features that we might not pay enough attention to differentiate between people. When I first started watching Japanese movies, I had a bit of a hard time grasping who was who, but as time went on it became easier.

This guy has like 6 different projects going on (Pixelfed, fedidb, Kbin app, Messenger app, etc.). I just wish he would focus on like one or two things instead.