One thing I'd be wary of is Googling error messages and taking answers from Stack Exchange. Rust has mutated (heh) a fair bit over the years and many SE answers to noob problems are obsolete and sometimes incorrect. At the very least check the datestamp on any answer and be wary of anything more than a year or two old. This goes double if the answer has some extremely awkward looking syntax with lots of modifiers and underscores sprinkled throughout. There's probably a better way to do it now, or an alternative solution that works better. Or maybe you're just trying to do something that Rust makes hard, like concurrent processing on a shared data structure.

The manual is safer even though it's harder to find your exact problem and solution, especially when you're just starting out.