My classmate: Text verbessern, bitte

hallo,
könnt ihr bitte meine Hausaufgabe verbessern?
Danke
He is my classmate and 15 years old.
He is tall with an athletic figure. He has a brother who is three years older than he. He is a balanced character and is not choleric. He is open minded and tolerant towards other people. Although he is catholic he goes in a protestant church. He has a lot of hobbies and is verstile interested in many things for example in technology, science and art. Since 12 years he practise skiing. 5 years ago he began mountainbiking , climbing and swimming. A futher hobby is painting. He likes to paint pictures with watercolour. He also likes to work with a railroad /Modelleisenbahn) His favourite music is Pop In his freetime he plays the turmpet and he is a member in a music club. He practises 5 hours a week and even at the weekend. He likes going out, make party together ....His special interest applies to his pets for which he bears the responsibility. He has to take care about all the pets but if it is too much his family helps him