I did some of the corrections myself (in parentheses). Could you please check them?

1) I like doing (making/baking) cakes and reading, but I don't have time to do this (though I can't find time for reading???).
2) I've got a quite oval face. I'm friendly and always smily (correction: smiling).I have a not very big mouth.(correction:) I haven't got a very big mouth.
3) I like doing clothes shopping. (I believe it is "do the shopping BUT go clothes/window shopping").
4) At five o'clock I do to calisthenics training. (better I go to ... training/practice). I like doing sports like dancing, running and skiing.
5) In the morning I put on my clothes (I get dressed) and then I go to take the bus. (better: I take the school bus). I go on the Internet. (correction: I go on line and I surf the net) . I have lunch and after it (correction: after that) I do my homework.

1) I like making/baking cakes and reading, though I can't find time for much reading.

2) I have an oval face. I'm friendly and always smiling. I haven't got a very big mouth.

3) I like doing clothes shopping. (I believe it is "do the shopping BUT go clothes/window shopping"). <~~Your corrections are right.

4) At five o'clock, I go to calisthenics practice. I like playing sports like dancing, running, and skiing.

5) In the morning I get dressed, and then I catch the school bus. I go online and surf the net. I have lunch, and after that, I do my homework.