I'm choosing between learning Nim or Rust. Nim frankly looks like the nicer of the two, but also less marketable and with smaller community. Suck to say but it's true.
Nim is also easier to learn - if you know Python and any conventional statically typed language, it's a walk in the park. I was producing fast, working code in a couple of hours. Learn Rust for your job, Nim for your side projects.
1.) Moves / borrowing / memory model 2.) Adopting a more functional style [to support 1.)]
My observation is that a lot of people /really/ want Rust to be imperative and treat it very imperatively they fight the borrow checker way more than if they adopt the idiomatic norms of Rust. There are some edge case data structures that can be a little painful and require some specialized knowledge, but once you are into Rust I don't even think it is unpleasant for side projects and general purpose hacking, but to get there it demands a higher level of mastery than most languages, but when you get there it can feel extremely productive.