On the upload page click on the browse button. Find the photo on your computer using the window that pops up. hint: If you keep all your photos in a folder on your desktop finding your photos will be really easy. When you find the photo click on it then click "Open" in the window. The window will close and the photo name will show up in the "Upload Photo" area on the page.
Don't click "Upload" yet! Right under the "Upload Photo" area you have a choice. You can choose to let everyone see your photos or you can choose to keep your photos private so only you can see them. Make your choice and then click the "Upload" button.