Oh God! I am going nuts! I've been trying to change my template ever since I started blogging and no, I still haven't had success with it. Everytime I try to upload a new HTML (I don't even know if my terminology is correct here) I always get this message:

Your template could not be parsed as it is not well-formed. Please make sure all XML elements are closed properly.
XML error message: The element type "img" must be terminated by the matching end-tag "".

I've read up on it but I just don't get it. It's all so much Greek to me. I now realize I'm a lot less smarter than I thought. Can anyone help me out? Or can recommend a HTML for dummies site or something? I'm about to have a breakdown here. Please and thank you!