Hi.
I’m not very technical and quite new to WP so please forgive my bad explanation…
Each of my pages is a ‘page’ in WP and I just assign a parent.
My category is actually a country. I have multiple boats in each country. For each boat I assign its parent page as the country to which it belongs. Each boat has series of 4 child pages (always the same for every boat) to which I assign the parent page as the boat.
I hope that makes sense?