Write it right. Here is the letter from your foreign friend

Dear Roman,
You asked me about my favourite subjects. I enjoy music classes because I like to sing. I have been learning to play the guitar for 3 years and I am in the school rock group. We perform at all the school parties. We play the music of popular performers. Its great! Rather often (3 or 4 times a year) we go to the classical music concerts. I cant say I like it very much but we have to go because its part of our school music programme. We usually write compositions about what we like or dislike about the concert after that. Do you have music lessons in your school? Have you got a rock group and a school choir in your school? What music do they sing or play? Do you and your classmates go to classical music concerts? What do you think about them?
Your friend,
Dan

Dear Dan!
Thank you for your letter. You have a very interesting pastime. Its great that you spend so much time enjoying the music. We have music lessons at school but unfortunately only once a week as I enjoy musical lessons too. There is a musical choir in our school and the songs they sing and play are unforgettable. They often organize great performances at our school where choir singers do their best. We sometimes meet with my friends and play some rock songs. Sometimes we with my classmates go to classical concerts and they are really marvelous. I really enjoy classical composers. It would be really nice to visit one of the concerts with you.
What do you think about this idea?
Your friend,
Roman.