Indeed, I watched all those youtube channels for quite a long time before deciding to build a foundry; there is excellent stuff out there! The Gingery books are really very good for books, but for a lot of these tasks it is so much more clear to watch someone do the work.
Have you looked into ironworking at all? I think building a bloomery furnace might be something you'd find interesting.
I'm going to try to get good at working aluminum before I move on to iron; that's a whole other level. Fortunately I have some friends who are master ironworkers so I will go to them for advice should I eventually get there!