Translation of Kundennummer

I try to learn English as much as possible so that I can travel next year to the United States. I would agree to your proposal but I also need to find good teachers. My goal is quality and speed.
My name is Wolfgang, and I am interested to build my Spanish vocabulary. Maybe we can practice together. How long have you learned Spanish? I have been learning for a few years with books.
I think you learn best through writing, talking and reading. Since I'm currently busy at my work and since I have no time for courses, I have no improvement plans for my Spanish studies.