How do people who don’t have experience with building things build out their vans?

How do people who don’t have experience with building things build out their vans?
I really am trying to build out my own camper van but i have no idea where to start. Is there guides out there or do you just look through YouTube videos to get a gist of what to do?Thanks in advance for any answers!

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Ingrandisci immagine - Repost: How do people who don’t have experience with building things build out their vans? (from Reddit.com)

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