下面是我的翻译：（纯手打人工翻译,非软件翻译,放心地用吧）
I've hesitated for a long time before writing to you because I'm not good at English.I spent most of my time painting and I decided to spend the next few months in the studio,so I need to reply to you before the intense training.Thanks a lot for your tea and it's quite tasty.I hope you'll like the coins that I gave to you.I think coins can be stored for a long time and I hope our friendship can last as long as the coins.
Every day I have lots of strange thoughts.For example,I always wonder what will there be at the edge of the universe or will there be one day when a robot like Doraemon stands in front of me,telling me that he's sent by my descendants thousands of years later.LOL!(laugh out loud表示大笑) My dream is to be an outstanding surgeon but it seems impossible now.Then I consider be an excellent designer as another goal and I am working hard to achieve it.
（为了符合英文表述习惯,有些地方意译了,没有直译）希望对你有帮助!有不懂的地方再追问好了.