How do you find mentors

Recently I started learning go, I wanted to learn a new backend language and after playing around a bit I started really enjoying it. However, being new to the language I am not sure if I am doing anything wrong or if there are better ways of doing things.

The question is...

How do you go about finding mentors or people to look over your code to provide a second opinion? Unfortunately, none of the people I work with knows go so I can't turn to them.

Are there any websites or places you go to find someone to help you learn concepts and provide feedback on your work?

Note: This doesn't have to be go specific, any guidance on the subject will be great!