Is there some kind of printable summary (or any kind of summary for that matter) of all the exercises contained/mixed in within all the lessons?

I'm only on lesson 7 but I'm wondering how we're supposed to keep track of all the stuff we're supposed to be practicing/working on?

Great question! The best way to keep track would be to download the exercises as you go, so you can create a warmup playlist. Please see here for more guidance: https://www.30daysinger.com/blog/one-lesson-per-day-how-to-practice-for-the-best-results