I recently had to learn Go. I was on a tight timeline of just about 4 or 5 days. I am familiar with learning Rust, and Rust by Example, so I found Go by Example. I found the format wanting for the absolute beginner level I was at, so I found the absolutely beautiful A Tour of Go instead. It has links to the official Go blog for some language features, plus a live playground, which is really great.
I learnt enough to pass a Hackerrank test, which is immensely gratifying :) It's such a lovely language - very non-threatening syntax and approachable. I hope to transition out of the embedded space and into pure application/web development one day, and I hope to use Go that day.