If you get the chance, Bill Kennedy and the folks at ArdanLabs put on a great Go training. I took the two day version at OSCON the other year, and it was a great intro to the language. I was able to feel productive with Go nearly immediately. The materials for the course are up on GitHub: https://github.com/ardanlabs/gotraining

"Serverless" is definitely something that's generating a lot of interest internally at DO, but it's not on the roadmap just yet.