What are some recommendations I can do to fulfill my experience while in Germany?

Eat a DÖner!! Try a lot of food! Go to a bakery. Travel a lot. Go see Würzburg, Nürnberg, Heidelberg especially around Christmas time they have the best Christmas markets ever. Try Glühwein with a shot of amaretto. Go skiing in Austria. Road trip down to Livorno Italy, hop on a ferry and go see Korsika. Born and raised in Germany those are the things I miss the most.

Go off base, meet locals, do stuff with them. In the Navy we never really had too much time on liberty, but meeting all different types of people around the world was the best experience.

Travel!