Hello - welcome to Confluence, the collaboration tool for the DataPortability project.
The first thing that needs to be pointed out, is that you are currently on the homepage of one of the spaces. Spaces are like independent wikis within the larger wiki ecosystem. If you notice the breadcrumbs above, you can go to the dashboard - a setting you can change later in your preferences to be the default way of entering.

But first, you need a tutorial. Confluence takes about five minutes to understand how to use it. I suggest you follow this tutorial first, because once you understand the basics, you will equip yourself with the understanding to explore with confidence.
Once you have completed the above tutorial, we will then run through how Confluence can help us with our goals.