I just want to know if the following sentences are possible.Thank you very much

1)I have (better: live) in a big family made up of five people.
2) My sister attended this school and ended it last year.
3) My hair is shaved (can you say that?) and brown. I like reading crime books, for example Agatha Christie's (ones?).
4)I love nature and the countryside, I often go hiking up the hills (in the hills?) to enjoy the scenery and get some fresh air.
5) I like scientific subjects and that's why I decided to attend this school.
6) In the future (When I'm grown-up,) I'd like to become a famous engineer.
7)The singer says that we shouldn't worry if we have troubles, are out of money or can't pay the rent. If we do, we'll make the others feel unhappy too.
8) I do a paper round (does it means that "I deliver the newspaper to other people's houses"?) to earn extra money.

1)I live in a big family made up of five people.

2) My sister attended this school through last year.

3) My head is shaved. I like reading crime novels, for example Agatha Christie's.

4)I love nature and the countryside, and I often go hiking in the hills to enjoy the scenery and get some fresh air.

5) I like scientific subjects, and that's why I decided to attend this school.

6) In the future, I'd like to become an electrical engineer.

7)The singer says that we shouldn't worry if we have troubles, are out of money or can't pay the rent. If we do, we'll make the others feel unhappy, too.

8) I have a paper route to earn extra money.