[bombcar]

I start with a good (usually older/respected) book in the area. I won’t understand everything but it provides a framework.

Then I look at its references and poke around a bit. Search the authors and see what they have.

Then if there are forums or video channels on the subject I take a look.

By now I have a decent amount of material to work through - a notebook (actual paper) helps me to jot down key concepts and things I want to dig into in more detail.

I reread the notebook and investigate further as needed.