Don't be afraid. There's no one that has to grade or judge your character. It's ready to go when you say it's done.
Make the thread, when you posted your wants and limits, copy the url/link and add it to your profile.
Go to 'forum profile' under 'profile' like you did for the costum avatar and scroll all rhe way down, then you see various tekstboxes, like character catalogue and wants and limits. You put the link there and save again by pressing the button I earlier mentioned.
But for plot's sake. I will take a look at your character and see what I can do with her ^^