Translation of mitgekommen

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.
Therefore we use only the Vocabulix dictionary in our class. It has good features and a large vocabulary base. I will have to send you a few sentences for rewriting if that is OK with you, because the whole is mixed up.
How do you like comics? I have actually never read them, but for learning a new language it is a great way; but the language often is not too correct. But it has mostly more advantages than drawbacks.