Translation of siebenunddreißig

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.
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.
My problem never was the writing part, but I did not have the courage to speak. When I did not get further, I had to use my hands and feet to communicate, which always seems a little stupid.