Welcome [member="Ben Revan"] - hope you enjoy your time with us!
First, pop over here to take a look at the Character Creation rules so you know how to tackle it:
http://starwarsrp.net/page/articles.html/_/role-play-rules/character-creation-r12
Second, when it's all done, post the character here:
http://starwarsrp.net/forum/51-character-creation/
And then you are set really, no approval process! Just create and get going, and then you can edit and add to your bio as you go, fleshing your character out with the RP you do.
The Dark Side Factions are few currently, but take a look here for a list of where you could find a place to go (if you wanted of course, you don't HAVE to be part of a Faction to write!):
http://starwarsrp.net/groups/
Shout if you have any questions or need help with anything.