Translation of pedagogic in German

So by age twelve, I had decided that I wanted to learn English and I was studying for the United States TOEFL at age twenty. Being bilingual practically from birth, makes speaking languages very easy for me.
Please explain me the exact differences between British and American .... This year I'm trying to make the TOEFL. We can then discuss how we can prepare for this exam. I failed the first time.
I've chosen a subject but for now I take a lot of art and language courses. Thank you for your tips! They helped me a lot. My uncle is a music teacher, but my father studied economics.