You're not blind ... you're just used to operating one way, while Apple operates an entirely different way on the iPad.
So, e-mailing is completely opposite than we are used to, which is to be in the Mail app and go find the file.
On the iPad, to e-mail an attachment, you have to be IN the app that contains the file you want to e-mail. Usually, there is a button that allows you to "call" for the Mail app to open a pop-up within that app. You enter your e-mail headers and the message and send off the e-mail.
Hope this helps and clarifies.
Marilyn