Not bad, a little noisy though.

The parking lot seems rather minimal in this shot. I think the focus is more on the sky than the lot itself.

Click on "My stuff" and then scroll down to the entry you want to edit and click "Edit entry"

Pretty simple but this site can be confusing when first joining. The forum can answer a lot of your questions usually pretty quick. Hope that helps.

There shouldn't be an option to delete so all you can do is to change the pictures to something else instead.

three shots of the same subject are in breach of the anonymity rules author, you might want to change them before they all get removed.