For your profile, just make a new topic here in the 'Guidelines' board, with a title saying something like "Lúthien's Characters" In that topic, you can post every single profile you make.
There's no forms to fill out for making your profile. You can put in as much information as you'd like It's understandable that not even the creators know everything about their characters when they are first dreamed up.
Just try and include some basic info in your character's profile, sich as their name, race, a description and maybe a bit of their history or their current proffesion.
If you have a picture of them, this would also be the place to put a link to it.
Note: If a character is made for a 'Roleplay Request', then the profile can be copied into the origional request topic, so poeple can see what characters have been made so far.
Example:
Human Male: empty Human Female: (username1) (paste character profile here, or down below)