First off, apply with your personal journal. Don't have one? Please make one. You can delete it after you're accepted (or rejected). Do NOT apply with a character journal, unless it's one from another game (we understand that it can be tedious logging in and out of those constantly); this will get you an automatic rejection, because it really, really skeeves us. Follow the application form PRECISELY. It's a simple question & answer deal. Finally, we will do our best to get back to you as SOON as possible to let you know whether or not you have been accepted.
If you are rejected, don't feel bad: you can reapply! If you're rejected again, you can reapply AGAIN! However, if you are rejected a third time, that's it. Sorry, but, by that point, it's clear you aren't the right person for the job. Regardless, you can apply as different characters as much as you want.
If you are accepted, well, we'll tell you what to do in the acceptance comment, but here's the rundown: first, make a character journal. Deck it out in the userpics, the layout appropriate to your character, whatever. Make sure the visible information is for your CHARACTER, not yourself; it gets confusing otherwise. Next, go to the Taken Characters topic, and reply with the required info (which will be listed at the top of the post). After that, join all of the related communities. Next (and this is optional), head on over to the OOC community, and give a "hey-howdy-hey" to the other players; they'll be glad to hear from you, I bet. Then, you're done! Go nuts! Post! Comment! Do a backflip!