I may have messed up the link, sorry! http://bfnightly.bracketproductions.com/rustbook/ should work.
Rust is a systems language, so its harder than Python and other very high-level languages. It tries really hard to not surprise you, and once you have the basics down it’s a relatively smooth learning curve. Some things - like threads - are much easier than other languages. Other things like the borrow checker will cause a bit of head-scratching at first.