This video helped me in the beginning: Doodle your Way to Being a Great Artist by Stefan Baumann. Early on in my journey I accepted his challenge to do 500 doodles a week. The first week I filled an entire sketchbook with 700 doodles!

A note about Stefan: he has some good advice, but I'm not a fan of how he teaches sometimes; I find he can be a bit dishonest and manipulative to get students to do what he wants. Just keep that in mind if you go on to watch more of his content. This doodling advice is great! I spent a few weeks focused on this. As I spent my weeks doodling, I listened to a bunch of art podcasts, interviews, discussions, etc. Check out the Draftsmen podcast and Creature Art Teacher; that's a great start, and there's so many more.

The goal at this stage is develop your hand-eye coordination to get your hand to do what you want it to, as well as to build up your visual library; but you don't have to consciously think about those things; as he said, don't worry about quality. Commit to a certain amount of doodles each day/week and have fun with it. Put in the time. This is a marathon, not a sprint.