Can you help me with my English?

Hi!

I started to work in an international company a couple of months ago. I am supposed to write English very well and to speak English fluently. But I had had no opportunity to practise my English skills before.    I learnt English at school, it is true, but it is not enough, isn´t  it? Now I teach English myself.  So I would like somebody to help me with this stuff.



Thanks in advance.