Start with I Tried Selling Digital Products for 90 Days (14 min, Tim Koa), then How To Start Digital Marketing for Beginners (No Experience Needed) (19 min, Tatyana Savage). All 32 lessons here are free, from the teachers' own official uploads. You'll need laptop stand, noise-cancelling headphones, second monitor and a few more basics (about $270 of kit). The book to keep beside you: The $100 Startup by Chris Guillebeau.