Many thanks for your letter - it was really nice to hear from you again.
It sounds like a great idea to spend some time abroad. Indeed, as you know, last year I spent two months in a summer camp in America. It was/I had a great time. I met a lot of new friends as well as improving my English. - Go ahead!
Firstly, Iíd suggest studying in Prague. Itís not as cheap as staying outside of Prague though. On the other hand, it offers the most/more/better possibilities for studying and spending your leisure time. There are plenty of wonderful places in our country. If you like, we can travel around during the weekends.
Actually, Czech is such a difficult language. Itís quite hard to learn for foreigners. Donít worry; lots of people can speak English. It will be enough if you remember several useful Czech words or/and phrases. You also asked about the sports facilities. I bet youíll find what you want here. Moreover, a new sports centre has recently opened near to my flat.
Lastly, courses start every month. Is it possible for you to put off your arrival? Is April suitable for you? I wish to help you, but I will be an exchange student in /on an exchange visit to Germany in March /during the month of March.
Once more, thanks a lot for your letter. I look forward to seeing you.
All the best,
Student or Learner