As far as I'm aware being a vegan is pretty hard. It involves never eating anything with eggs and honey in them (that's as far as I know about it though, sorry, lol). I've found a few links from vegan societies which give info on nutrition:

http://www.vegansociety.com/html/
http://www.vegan.org/
http://www.vegsoc.org/info/vegan-nutrition.html

... but there will be lots more info online too.

I agree that you wanting to become vegan might be an extension of anorexia - but you'll have to watch yourself, and your weight, carefully to make sure you remain in good health.