I'm going to quote the Gopher bot from the Gophers Slack channel on this one, and I highly recommend you to check it out, since it's a great source of learning and community!

Here are some resources you should check out if you are learning / new to Go:
First you should take the language tour: tour.golang.org/

Then, you should visit:

• golang.org/doc/code.html to learn how to organize your Go workspace
• golang.org/doc/effective_go.html be more effective at writing Go
• golang.org/ref/spec learn more about the language itself
• golang.org/doc/#articles a lot more reading material

There are some awesome websites as well:

• blog.gopheracademy.com great resources for Gophers in general
• gotime.fm awesome weekly podcast of Go awesomeness
• gobyexample.com examples of how to do things in Go
• go-database-sql.org how to use SQL databases in Go
• dmitri.shuralyov.com/idiomatic-go tips on how to write more idiomatic Go code
• divan.github.io/posts/avoid_gotchas will help you avoid gotchas in Go
• golangbot.com tutorials to help you get started in Go

There's also an exhaustive list of videos gophervids.appspot.com related to Go from various authors.

If you prefer books, you can try these:

• golangbootcamp.com/book
• gopl.io/
• manning.com/books/go-in-action (if you e-mail @wkennedy at bill@ardanlabs.com you can get a free copy for being part of this Slack)

If you want to learn how to organize your Go project, make sure to read: medium.com/@benbjohnson/standard-p....
Once you are accustomed to the language and syntax, you can read this series of articles for a walkthrough the various standard library packages: medium.com/go-walkthrough.

Finally, github.com/golang/go/wiki#learning... will give a list of even more resources to learn Go