go to the  ad board that serves your location.  click on the link 'self help center'.  that will give list of links to answer various questions.  just be sure to follow the rules.

Swim

Do you mean "TER Profile" or do you mean non-TER advertisements? If by "the whole profile thing" you mean TER Profiles (with Provider info above and Reviews below), you don't have anything to do with that until you HAVE a TER Profile. YOU do not create your TER Profile.  
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YOU do not create your own TER Profile. The first person to write a Review for you enters as much info as they can into a blank Profile form, e.g.,  
General Info
- Ad website (a TER requirement, but I think that a TER Ad Board ad is sufficient. Anybody know for sure?)
- etc.
.
Appearance
- Massage
- etc..  
Many times, the first reviewer enters a lot of "Don't Know" or even incorrect info. You can correct it after the Profile becomes live. (E.g., "I am not 5'3", I am 5'7" or similar.)
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Services
--- as above, the first Reviewer enters info to the best of their ability (sometimes incorrect info that you can correct later)
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Reviews
--- it's all on the Reviewers
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If by "the whole profile thing because I’ve seen a lot of girls ***profiles and it looks really fancy***" you are referring to Provider personal websites (e.g., [email protected]) or ads on other sites (e.g., Tryst, Slixa, etc.) that's another set of Qs to Search on Newbie or on your local Discussion Board. Different ad forums have different usage in different geographic locations, so ask locally for suggestions.
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Good luck!