Advice needed for a newbie

Hi all — I’m brand new to this sub/sewing. I never even thought I’d post on Reddit seeking advice, having lurked in the shadows for so long. But after years and years of putting it off, 2024 I want to chase a long dream. I’ve always wanted to be able to thrift an old band T-Shirt and make it into the perfect crop top. Take a football flag and make it a puffer vest. Turn old jeans into something fun with patterns.

I had never touched a sewing machine or thread. But this year I decided to go for it. I’m taking a professional class in a few weeks, but would love to hear from professionals how you learned. Any books, videos, personally advice would be appreciated. I’ve seen Reddit do some beautiful things, and this year I’d like to take a chance on me. Appreciate the thoughts and reading!!