Writing prompt: Application

Student essay:
Dear Mr. Smith
I am L,who want to know about the information that the foreign teachers tend to open several English courses.
First,I have learnt English for so many years and I can do well in the exams. However,when I communicate with foreigners in English . I have difficult hearing clearly what did they say and couldn't speak English frequently. So I want to involve in the lesson about English speaking,which makes me confidence to communicate with foreigners. Last but not least,I hope that I can be allowed to take part in the course,so that I can make more friends with foreigners and make progress in my English speaking .
I'm looking forward to receiving your early reply .
Yours L

Corrected essay:
Dear Mr. Smith,
I am L, who wants to know about the information that the foreign teachers tend to open several English courses.
First, I have learnt English for so many years and I can do well in the exams. However, when I communicate with foreigners in English, I have difficulty hearing clearly what they say and can't speak English frequently. So I want to be involved in the lesson about English speaking, which makes me confident to communicate with foreigners. Last but not least, I hope that I can be allowed to take part in the course, so that I can make more friends with foreigners and make progress in my English speaking.
I'm looking forward to receiving your early reply.
Yours,
L