No idea how to write a real program

When I started getting interested in programming, I got sucked in by the Rust hype and decided to learn it as my first language. I am currently on chapter 15 on the book, and I think I have a good understanding of the stuff I read up to that point. However, when I try to program anything real, I get very overwhelmed and can't seem to figure things out. I feel as if the libraries I see are either too abstracted to teach me anything about Rust itself, and I have to learn about the library. Or, things are complicated and I see crazy patterns that take me a long time to figure out. What projects can I write to teach me fundamentals?