Please check my english ! and correct it plz!?

After I send you a e-mail, I looking forward your e-mail to arrive.
Surprisely, what you wrote in your e-mail is something that I totally don't know before.
As I mentioned before I hadn't much information about my U.S. school, and It was very disappointed to me !
But now I got your e-mail, and understand almost every thing about my U.S. school. It is very exciting ! !
I would like to know what ages are my dormmates comparable to me, younger or older ?
I've been visited School website and found out that maybe I can participate in School band.
Since I like to play flute, I hope I can join the School band if it is possible !
I wouldl like to know below address is my dorm/home address.
I think the school start middle of the summer according to the information I got from the school website,
So I think I can share some summer in there.
Thank you for your earnest e-mail, and I hope you'll have a nice time ! yours respectfully,

This is the letter for my future school teacher, So it have to be polite.

If my letter contains some rude expressions, and grammatical mistakes.

I hope everyone please correct it for me !

Trust you received my reply to your E Mail of.... (date) (time)....and I look forward to your further reply. The information you gave me was very interesting. You have helped me correct my previous lack of knowledge about the school in the United States. Thanks to you I now understand everything about the school and what you tell me seems very exciting indeed. I am still very interested to learn what the ages of my dormitory mates is compared to me. I have also now visited the school's website and am delighted to find out that I could聽 become part of the school band, since I am already an accomplished flautist.聽聽 Can you also kindly advise me of the mailing address of the dormitory where i will reside. The website also appears to indicate I would be likely to start in mid summer and so spend the latter part of the summer months there and is that also correct please? I am really most grateful for all your assistance and explanations and hope you will enjoy a much deserved happy, harmonious and successful future. With my very best wishes

After sending you an e-mail, I was looking forward to your e-mail to arrive.
Surprisingly, what you wrote in your e-mail is something that I totally didn't know before.
As I mentioned before I lacked a lot of information about my American school, and I was disappointed to me!
But now I got your e-mail and understand almost every thing about my new school. It is very exciting!
I would like to know what ages are my dorm mates compared to mine, younger or older?
I've visited the school's website and found out that I may be able to participate in the school's band.
Since I like to play flute, I hope I can join the school band if it is possible!
I would like to know below address is my dorm/home address.
I think the school starts in the middle of the summer, according to the information I received, from the school website; therefore, I think I can spend some of the summer there.

Thank you for your earnest e-mail, and I hope you'll have a nice time!
Your's respectfully,