Book and Ledger: Introduction to forming a business, good overview, especially the part of different business structures (LLC, etc).
IndieHackers: Some links to interviews and info on no-code programming. I think this is fine for people who want to put together strawman products or MVP apps, but I am not sure this would be a good base for a “for-real” business. But – who am I to say this? I am no entrepreneur!
Joshua Lyman: What I learned about bootstrapping in 2017 – the article breaks his experience into seven lessons. I liked the details he shared about his stumbles as well as his successes.