Button “Load more” in category

Hi, I need make to button “Load more” in category and I don’t know how to make it ;(

I try it writing in JQuery show only 6 elements, other add class “hidden” ,
next if click “Load more” rest remove this class.

but it’s problem with select next category and filtering ;/

good options it’s in ajax but i don’t know how to create pagintation and make it in this plugins.

Please help me with this problem ;(