I'd like to be a good English writer

For better or worse, I have to admit that English is the single universal language in the 21 century. For those who have international aspiration, English is an essentional tool for communication. On the internet, the most important English skills are reading and writing. If you want to get your voice heard to the public in the world, you need to express yourself in Enlgish. This is a lethal handicap for non native English speakers like me...but whining is no use and I just have to do what to do. 

I do notice that my English sentences are not perfectly natural for native English speakers. I'd like to improve my writing but don't know how. Anyway, I will try my best to express myself in English.