Dear Robério,
Here is my correction:
My purpose is to improve my Englsih skills. I have read a number of books written in English, but I need to share my experiences with other people. I studied English 15 years ago, but I think that I have forgotten all of it. I would be quite happy if someone would/could help me. At the same time, I can help someone learn Portuguese. I am a civil engineer in Brazil.
O meu querido Robério,
Eu ensino português em Israel mas desde que ele não é minha lingua mãe, eu sempre pode melhorar-me. Assim, gostaria muito trocar licões e idéas com você.