Translation of deseable

I want to improve my level of English. Have you ever been in the U.S. and in which states have you been? I've been in England, Scotland and Ireland, but unfortunately, I have never been to America.
I want to study either computer science or do an MBA. I love to programm and I am doing it a lot, although I am very impatient sometimes. I also like math, but I hate writting long letters.
My Spanish is weak, and I need to improve it here. But it is very difficult because I have many other things to do. I must take care of my family and my friends and have no time for Spanish.