Minecraft cruise ship build, is there a blueprint?

I would like to build a cruise ship on Minecraft. But it is not so easy, my question now: does anyone know any good page / app / video or similar where there's a blueprint of a cruise ship? Have you ever built such a cruise ship? If so, how did you build that? Should I build the ship in the water? Or not?

Maybe that helps: https://www.istockphoto.com/ch/foto/kreuzfahrtschiff-konzept-architekt-blueprint-isoliert-gm991872484-268768704
Otherwise, look at a few videos of real cruise ships, then you should have it feeling like that has to look like.