It's always fascinating to ponder how people with limited technology managed to create splendor from seemingly nothing. Documentary geeks that we are, Rosa and I have enjoyed a couple of interesting documentaries both featuring the trio of historian, Ruth Goodman, and archeologists, Peter Ginn, and Tom Pinfold 'learning by doing'.....with the help of other experts and some old books, excerpts, and illustrations.
If you'd like to see how castles were built or people survived in Medieval times, consider: (On Amazon Prime) "Secrets of the Castle" and "Tudor Monastery Farm". Secrets was my favorite and features a wonderful 25-year project currently 17 years in, taking place in France: the construction of an actual castle using only local supplies and employing only Period-accurate tools.
Some of the ways these people lived and did things might be as shocking as a arrow up one's ass, so have a look!