Translation of twenty-one in German

I had just said that if you wanted we could meet up on the last weekend in October, I have to be in Malaga the following week... Your English is very good! Would be nice to hear something from you!
Yes I do live in the United States of America. Thanks for contacting me! I am okay with my Spanish, but when creating sentences I'm terrible at using the right form of the la, el, un y una.
I'm writing you in English because I don't have a lot of time and writing in German will take me a long time. Just a few corrections: you can not say in English How you do, you need to say How do you do...