Please! Check my composition! Can you add something ? The composition is called '' Sport in our lives"

Hello! My name is Marina. I study at school № 429 in Lomonosov. I like sports very much. It is the second favourite activity in my life after school.
Every day I get up at 7 and do my morning exercises. Then I have a breakfast and go to school. After school, I do my homework and go cycling with my friends. In winter I prefer skiing. I like all kinds of sports, but mostly I like volleyball, skating, roller-skating and swimming. My favourite sport is basketball.
I am a member of the school basketball team. We took part in the inter-city competitions and achieved third place.
When I grow up I want to be a basketball player. This is my dream. But I have an another dream too…. maybe someday I will be a famous dancer. I usually dance at school concerts.
I can’t imagine my life without sport.
Sports is very important in our lives. It helps teenagers to become strong and healthy. I don’t support bad habits in our life. I know that good habits and a healthy lifestyle will help us in our future.
You would never know for certain whom you want to be in your future life. Everyone wants to be beautiful and healthy in the future. I want to every teenager, and even adults, to do sports. Otherwise, you might never know what a pleasure is it to achive your aims in sport. At first, try to run 1 km in a stadium. If it’s difficult for you don’t hesitate to train. It will soon turn into a pleasant experience. soon/
But the most important thing is that achiving our aims in sports helps us to achieve our aims in our lives. That is why I believe that sports will make my life better.

Well written.

'sport' is a collective noun and is usually, but not always, singular.

Don't forget that there is never a space before a comma or fullstop.