Log into the WordPress Dashboard to edit your own post or add media:

WP-log-in-screen

You will have to enter your university username and password:
Log-in-screen-2

Find your name in the list and click on it. Then you can click the Edit Post button:
Edit-page

The dashboard view looks like this. You can add text to the text box and click Update to save it. Have a look at the Categories tab to the right. Here you can tick the relevant boxes (and it means it is searchable for me later on). To upload images, click on the MEDIA on the left hand panel.
WP-main-screen-1