Between Go and Rust, I think you should pick Go because there are a significant number of developers from Python/Ruby/JavaScript enjoying programming Go. Many startups start using Go[1] and couple of universities use Go in their classes[2]. Rust targets system development primarily occupied by C/C++ developers. Many still prefer C++ and I rarely see Rust job.
[1] https://news.ycombinator.com/item?id=10822019
[2] https://github.com/golang/go/wiki/Courses
Edit: I may be biased since I enjoy programming in Go.