First notebook entry: Introducing myself

My name is Steve, I'm lived in Xiamen, China. I'm forty. I have a son and Iove him very much.
In my work I frequently usually use in English, but r Ieally [OR then I] forget everything that I learned, so had leart,So I must relearn it.

Welcome to italki.
A few problems but not bad. 
The problem that almost every Chinese member has is the punctuation and spacing. There is always a space after a period (.), comma (,), question mark (?), exclamation point (!), etc. The next sentence (but not the next phrase - as in after a comma) always starts with a capital letter. You would do well to attach a note to your computer to remind yourself of that so that it becomes easy to do.