Watch German movies and der spiegel on YouTube to help learn pronunciation.
Start with basic phrases.
There are a bunch of YouTube channels that will help your learn phrases.
Immerse yourself in the language. You obviously already know English so if you travel to Munich or Berlin you can still communicate to most people.
If you manage to make it there go to beer halls and strike up conversations with strangers.
I used to teach rudimentary German when in college.