Creating language is all about developing the skills to talk and write with increasing freedom in the target language (in this case, German). It's the end-game, as far as I'm concerned, because being able to speak a foreign language lets your own world unfold and become wide open.
It's an exciting journey, full of experiences that will enrich your life and it's basically like learning to ride a bike with the stabilisers on... The structures that you learn by heart and adapt are the stabilisers and, once you grow in confidence at adapting these phrases, you will start to learn how to produce your own language, saying what you want to say and sharing your ideas. All it takes is practice!
Ready? Here we go...