Individually designed games and videos together with links to a multitude of fun information freely available to everyone will make learning much more fun and more effective to retain. It doesn't matter what age we are, we still learn much better with different recourses which can help us all the way.
“Tell me and I forget, teach me and I may remember, involve me and I learn.”
- Benjamin Franklin -
The words of Benjamin Franklin are so true as we all know, that we learn better if we are enjoying what we are doing and through engaging in the process. It has been proven that using games in education has improved the achievements and experiences of students.
It doesn’t matter what age you are or why you are learning German, if you are on your own or in a group, from experience I find learning languages should always include games and quizzes.
Why don't you have a look at the following websites or channels and have a go. Even for the absolute beginner they are fun. I often implement these into my course work or revision. I must admit that even as a German I quite enjoy doing a few and see how quick I am.