Hello Diamond Diva, and welcome to the boards. Go to your profile, where you chose your icon, and your signature block will be there. You can go to the test area here on the boards to play with it until you get it just the way you want it.
Also, when you have your signature ready, in the reply pop up box when you make a post, the Add signature box needs to have a check mark in it (if it doesnt automatically, depending on how you set up the dig in your profile [if I am remembering correctly, you can opt to always attach sig there])