Connecting Section Filters and Adjusting Mobile Header in Webflow

I am having an issue with Section_Filters4. I have added a collection which shows fine but its not clear how to actually connect it:

1.
How do you connect it to the filters?
2.
How do you populate the filters, ideally this would be dynamic based on collection data?
3.
How do you hook up the 'showing 0 of 100' so it updates correctly?
4.
I also have a sticky header and on mobile the filters modal is underneath the header, is there a way to fix that i.e. adjust down below the header or show above?