When I was getting my head around the idea of building my own pair of skis the how to on skibuilders gave me a good idea of the steps, materials etc that were involved. I didn’t end up following it exactly and pressed them using a vacuum set up like you do airplane/boat/car fibreglass parts but it gives you a good idea.
something happened to the skibuilders site and they never put the how to page back up but you can see it in the wayback machine:
https://web.archive.org/web/20181106164612/http://skibuilders.com/howto/