Click "go advanced" scroll to bottom, manage attachments. Done.
I also have a VERY hard time believing a 12 yr old can't figure out how to work the internets lol.
Also, as I said, you can make a photobucket account (google it), upload all the pics you want like you said, (browse/upload) and then click on your pic and the bottom right will give you 4 links to copy/paste into a forum reply. This is a hyperlink that makes the pic appear. You want the bottom of the 4 links for forums.
2000 Mustang GT Steeda build #48. Bolt ons, suspension, Novi 2000.
Just because I give you advice, doesn't mean I know more than you. Its just means I've done more stupid ****.