Translation of weitaus

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.
In plural there is no difference between the formal and the colloquial address form. Do you mean that you are using 3rd person singular form for the plural imperative? If so, I will change all entries so far.
Have you ever done something like that in Spanish? I also think that we should see each other when you're close, I can help you with Spanish, and you can do the same for me in English. Do we have a deal?