We do hope that you will stay for a long time. Enjoy your stay as we work to become the best Naruto info site out there. BELIEVE IT!
If you're looking for something to do why not look over the Forums or more specifically Narutopedia Collaboration for a list of projects we're working on. And the Community portal has a lot of recent discussions and places to go listed on it.
I assume you're asking about File:TekkaUchiha.jpg? Since the image is still in use there's no need to delete it. As for what you may have "messed up" on, problems tend to occur when uploading a new version of an old image. If you'd like to try uploading your image again, do so under a new name. File:Tekka.jpg or something.
As for when to add image information, there are a couple of opportunities. When an image is first uploaded, fair use and licensing can be selected at that time. There isn't a form to use for fair use so you need to add it manually (it's easiest to just copy another image's fair use and modify it). Once the image has been uploaded the description page of the image can be edited in the same way any other page on the wiki can be edited: with the "edit this page" option. ~SnapperTo 16:53, May 30, 2011 (UTC)