Please help me correct this essay below. Thank you so much!
"At work, I am fortunate to have the opportunity to use my 4 English skills to communicate with my colleagues from other countries. Since then, my English has improved and I've become fluent.
When I was a college student and after graduating, I worked as a part-time tutor and was teaching English to middle and high school students. During that time, I could understand the difficulties of learning a new language, I was very patient, enthusiastic and ready to help them. Besides that, I was also like a good friend who always shared and listened to their concerns.
When I saw the description of this position, I was really impressed. I hope I can use my ability and dedication to convey meaningful things from the Vietnamese language and culture."