There are multiple resources available to learn Go. The Go Playground allows you to write code in the browser and test it, without that you need to install anything locally.
If you want to start developing Golang more seriously, you will not get around using an IDE that offers you autocompletion and also Debugging capabilities.
Install the Golang runtime environment by following the instructions at https://golang.org/doc/install. If you are installing Go on Windows you can use the MSI Installer which also sets environment variables in the system. These environment variables are needed to access go from the command line.
go get -u github.com/ajstarks/svgo/benchviz go get -u github.com/golang/lint/golint go get -u golang.org/x/tools/cmd/benchcmp