Translation of preceding 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.
Was that all? I was sure that I had a lot more mistakes, because I did not know how to express myself properly. Maybe I am a natural born talent. I am just kidding. Let me know if you need something else.
So you want to know what I'm doing? I am 22 years old and I am studying medicine at the university in Atlanta. I want to learn German because I have a German girlfriend. We want to get married.