Translation of Klause

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.
Could you please read the following offers in a critical manner and confirm it before I will send it? I have also mentioned the warranty and the software in the offer, because it was requested by the customer.
As mentioned earlier, much depends on the structure. How do you want to work with us. I am definitely interested in a possible cooperation, and I am open to any suggestions for any solutions.