Estuary or estuary mod ?

Hi all,

i am new to kodi and i have a question if i may.

Krypton version seems so familiar for me (a noob kodi user) in conjunction with Confluence which was really difficult -for me at least- to use so i had to switch to another skin.

I have 4 external disk which they have grouped material.
One disk has movies ,one disk TV series,once disk 3d movies and one disk my kids cartoons.

My question is can I add to Kodi Krypton home screen more selections except movies and tvshows?
I would like to add 3d movies and children movies as extra selections.
Is this possible?

Also is it better to use Estuary mod skin for this or plain estuary.

I know my question is very noobish but although i search to find a tutorial about this i cannot.

A heads up would be appreciated.

Thank you for your time reading this.

Regards,
the_observer.