Kimylamp
You will have to learn general systems programming, do not shy from c/cpp resources. Rust is a systems programming language. You will have to learn systems programming, then both c and rust will make sense. See for example The Cherno
The rust book assumes you know how to program, but it doesn't assume you're an expert on systems programming. It explains many things. The rust book is, of course, your best resource.
It is !=, its just a font that renders != as a wide ≠ bc it looks nice