Wix add filters code to website

https://www.green-yachting.online/saronic-charters there are tick boxes on the site that need to be linked back to the data set to act as filters when they are ticked or not.

Only the first page needs to be done, once the code is working I will replicate across the rest of the site. The issue I am having is that Wix documentation in terms of what the filters do and what the Wix editor are accepting are different.

This should be a short sharp 10 minute job for someone who is proficient with Wix.