Nice! You added an autosig. Looks good. And, now since I grew up in Jacksonville, I know right where you are.
Keep in mind when you change an autosig or display name, it changes on every post you have ever done over years. It isn't associated only with that saved post. In fact, you can scroll up and see.
If you ever wanted to to change your display name, you can do that as well. imed is fine. But, if you wanted to change to anything you can in profile as well. Just have to keep your default email and your default username.
Seems like a lot of info. It is very simple. If you have questions, I can remote in and set it up for you.