I’d start with 5/3/1 as a beginner. Either one of the full body Beginner programs or just traditional 5/3/1.
I don’t really have leanings about full body or upper/lower. They both work.
Eating and nutrition, I’d be a lot more mindful of what I eat and learn to cook 3 different meals. When I first started, I was a kid and most of my food was junk. I got away with it because I could, but it took a long time to learn how to eat right, and I’d be a lot further ahead if I had mastered a slow cooker and a foreman grill.
I’d read less to fight the urge to add things into my training.
3 major things; effort, consistency and time trump everything else. If you work hard, work often, and work for a long time, you’ll get results. You can’t rush any part of it.