how can I write about myself in french

If you don't actually know how to write in French, you can write what you want in English and then use one of the translation sites online to translate it into French. Some of the meaning may not be exactly the same, but it should be pretty close.

Here is one example... have fun with it!

Free Translation and Professional Translation Services from SDL

If you have a text to translate, you can post it here. Incidentally, I learn French, and I can deal with translation quite well. I'd be glad to help :)