I have made more and more friends as well as improved my oral English.这句话有语法问题么?

I love English
When I was seven,I started learning English.I played games and sang English songs with other children.Sometimes,I watched English cartoons.It's funny.Then I discovered the beauty of the language,and began my colorful dream in the English world.
I hope I can travel around the world someday.I want to go to America to visit Washington,because my cousin is over there.Of course,I want to go to London too,because England is where English language developed.If I can ride my bike in Cambridge University,I will be very happy.
I hope I can speak English with everyone in the world.Also I'll introduce China to them,such as the Great Wall,and the gardens in Suzhou.I will teaching people of the world about the beautiful language of our country.
I like the English language.To learn English is wonderful.I once wanted to be an English teacher .I also like Chinese literature.When I was really young,I was able to remember lots of poems.I also wanted to be a teacher of Chinese.Now I think that both of my dreams can come true:I will be able to use English to teach foreign friends Chinese and share Chinese culture with them.So that more and more people will be able to get to know the 5000 years' history culture,and the prosperity of our great China.
My future is not a dream.I am confident that it will come true