Right now it seems that the admin user can be defined with and without the super flag. Without I cannot edit anything which seems odd. Shouldn’t I be able to edit at least the pages itself then?
Check out http://learn.getgrav.org/admin-panel/faq#managing-acl. You can fine-tune the access you give to users in the admin panel (e.g. admin.pages to just edit pages and not the configuration, for example)
There 
I missed that one. Thanks!