Don't worry about sounding like a native at this point. You most probably never will and that's totally okay. A slight foreign accent is actually quite charming. Learning a language is never about total assimilation to the target culture or language. It is about creating your own identity. If you are interested in what this means, watch this speech of mine that I made on Creative Mornings Berlin.

By the way: Pronunciation in German is called "Aussprache (f)" which means as much as "speaking things out" and a good phrase to remember is: "Wie ist meine Aussprache?" (=How is my pronunciation?)