Culture update

So I (Piper) just finished my second, much shorter language class as I struggle to speak the language. This one was less culturally fulfilling--all Americans-- but we actually worked on grammar instead of vocabulary. This way I can understand how sentences fit together, right?
Sure.
Did you know that prepositions determine the case of the noun? A car, for instance, is neither male nor female. It is neuter: das Auto. If you want something for the car, you say fur das Auto. But if you need something with the car, it changes to dem Auto. If you use one of the many prepositions that take either case, then you determine if it is accusative or dative if there is (are you ready for this one...) implied movement in the verb.
My brain jammed on this one. Implied movement? Are you kidding?
I am saved, however, by location. Apparently Southerners are mocked in Germany for their funny accent and bad grammar. We have a local dialect called Schwabisch that I love to listen to, though proper German speakers cringe. I did my homework at the swimming center while T and MM had swim practice. I would ask the people around me. It always came down to a majority vote because no one really knew which one or why.
One the positive side, I'm starting to pick up more and more vocabulary. I can now use, somewhat correctly, words like "die Tasche" "die Tuete" and "der Beutel" (translation: a bag, a bag, and a bag, but they hold different things).