In answer to your questions:
- Yes, these categories are set up by you initially, so they can be whatever you want them to be.
- This could be achieved through customization of the default theme, but there are no specific settings in the theme to make the changes within the admin dashboard. Third party plugins are not officially supported, so we cannot guarantee that they will definitely be compatible with the theme out of the box.
- As above, that would require customization to change the default sidebar box with the tabs.
You may like to check out the
ClassiPress customer showcase for an idea of what can be done with the theme through customization, but as mentioned above, categories are set up in the admin dashboard so do not require customization. Thanks.