Welcome ;)

For character sheets, I'll throw a few old guides out. The most broad piece of advice I can give (throw a PM if you want more specific stuff) is to look at other character sheets, compare them, and then use the writing style (style, not words or content) and form it into something of your own. These go a bit beyond character sheets, but here's a few things that could be useful...

[url=http://www.roleplayerguild.com/topics/126310-the-beginners-guide-to-role-play/ooc]The Beginners Guide To Role Play[/url]
^Assumes a basic level of knowledge, but you might get a good refresher.

If you want to get fancy in the forms, a few guides.
[url=http://www.roleplayerguild.com/topics/143069-symbols-characters-bobs-and-bits-useful-for-creating-titles-and-pretty/ooc]Symbols, characters, bobs and bits, useful for creating titles and pretty stuff.[/url]
[url=http://www.roleplayerguild.com/topics/153116-the-art-beauty-of-bbcoding-complete/ooc]The Art & Beauty of BBcoding [COMPLETE] [/url]