You need to make sure two things are in order. Hold the Alt key and double-click on your icon, and go to the Shortcut tab. The Target box should look like the image's box. Before you log in. If this is in order, log in and you should be able to get in.
Attachments are a way of sending files via e-mail.
This brings up a new window with a choice of buttons. The only one that you need is Select File. Find the file and double-click on it. Now click Close in the window we saw just a little bit ago, and the attachment will appear in the bottom of the e-mail. When you send the e-mail, the file will be sent along with it.