Dear David
Im glad to receive your e-mail and happy to know that you are interested in learning Chinese.
You say you often make mistakes during learning English.I think you will learn Chinese very well.You can take part in Chinese Club and take with Clubs members in Chinese.
You also can watch Chinese programme on the Internet.In your spare time,you can write messages in Chinese to me and I will reply your messages.
I hope you will use Chinese to talk with me oneday.I hope you can com to China.I am looking forward to your reply.