Use present simply to the email.
Hi, Masha,
I'm Sam, your new pen friend. I'm 13 years old and 1).....(live) in Wales. There 2).....(be) 4 people in my family: my mum and my dad, my sister and me. I 3).....(not\have) any brothers. I've got a dog, too. 4).....(you\have) any pets?
Every morning, we 5).....(get up) at 7 am. We 6).....(have) breakfast together and then my sister and I 7).....(go) to school on foot. In the afternoons, I 8).....(not\go) home right after school. I usually 9).....(stay) in the computer lab and do my homework.
Then, I 10).....(hang out) with my friends at the skating rink. My sister 11).....(not\like) it. She usually 12).....(go) home to study.
At the weekend, we usually 13).....(help) our parents about the house. 14).....(you\do) any chores at home?
Write soon,
Sam

1 live2 are3 don't have4 Do you have...?5 get up6 have7 go8 don't go9 stay10 hang out11 doesn't like12 goes13 help14 Do you do...?