I try to understand why this programming language was developed.. This would help you to think from the perspective of programming language than a general notion.
Walk over official documentation.
Look to greatest developers of these languages, blogs and their comments and their approach. ( I had watched every videos of Rob Pike when I started learning go)
Look at best Practices for this language(established methodologies).This would make me to avoid common mistakes.
Basically I take up a project with basic skill gained.
Take up some greater courses on Udemy of Udacity. Watch every video on youtube related to this language.