Hi,Ben.!
I've got your letter and I'm glad to know that you want to start going in for sports.If you have never gone in for sports before I advise you to begin from running in the morning. You may run for half an hour for the first time. Then you can take any sport you like. My classmates are fond of football. In winter we go skating or skiing. It's wonderful to go out on a fine frosty day. You know we play football at PT classes even in winter because football is popular in my country.
So , Ben I hope to see you healthy and strong next holidays.
See you soon.
Bye-bye
Your friend. ... (имя)