Teaching, Course, or MORE THAN Tutorial Material

Hey everyone, I have started and completed my first build (minus some difficulties on the software side. If you think you can help me with a Routy build with GRBL please let me know). What I'm looking for a person could call a "course" in related materials. I suppose this mostly pertains to a router table. I would like to have a knowledge of bits, materials, feedrates, and any of this other stuff. I'd like to be able to both understand and figure.

I would also love if someone could point me...

Teaching, Course, or MORE THAN Tutorial Material