Spotlight Theme - Collections

[disappearhere]

Hi!

My website is www.disappearhere.org

I want to be able to have someone click on the 'crystals' collection image on the front page and it open a page with a similar grid of types of crystals from there. I would like them to then be able to click on 'crystal carvings' for example and it then open that collection. I don't want all the sub sections to be seen on the homepage 

Ive tried to do this so many ways before nothing seems to work...please help!