The activities page has been created months ago but never had the time to update it with more information. I thought about it many times and the information I had in mind, already exist at other pages so no need for double work. Now, the activities page has the the type of 'more information' and/or 'advance information' about testing. Each of the main and the sub page are linked with very visible and clear link :)
Now, I believe the Main Testing Page of Ubuntu GNOME is easier and more user friendly. Colors, etc. It should be super easy for a newcomer to testing.