For the step by step guide, read the manual in the thread pinned to the top of this forum. Right now, it's just above this thread.
As for setting up your profile, that's the easiest thing you'll ever do.... Because you can't. Your profile will be created by a client who writes your first review.
You may try going to the reviews section and running some searches on any names, phone numbers, email addys, etc you've used to make sure you don't already have any reviews. Sometimes women are reviewed here and don't know it.
If you find a review of yourself, write to admin to claim your profile.
You can't put a link to a website in a thread starter, but you can in a response. Like if you were to respond to me here, for instance. Oh, they want your site to have the TER logo on it. I'm sure a sister provider would help you get it on there, but the codes for them can be found through the site map.
Run ads on your regional ad boards and post in the photo only board if you want, but read the rules for the respective boards first. Jump into some conversations on your local board and the GD.
There's a thread just a bit down the page about how to post a pic in the forums. But again, read the forum guidelines.
Here's a link to the board guidelines.
Good luck!
If stuff still doesn't make sense, run searches for keywords on the newbie board here, and also I'm sure people much more helpful than me will be along to pitch in.