When I went to Russia a couple of years ago, I saw lots of haystacks. somewhat similar to this one.
If you want to learn to stack hay, find a rural Russian friend, and volunteer to come and help during haying season.
I think they all had the pole in the center. Unfortunately I didn't get a chance to "build" one.
The first year we had some property in the country, my Dad had an idea that we should cut and stack our own hay. We cut a pasture using a sickel bar on an Ariens tiller, then managed to get it piled up. It was a very loose stack, and a lot of work. We covered it with a tarp. Anyway, after that we either bought hay, or later had someone come and bale our hay.
Our neighbor's barn has a wooden track and trolley system down the middle of the hay loft that I'm pretty sure was to stack loose hay, although it hasn't been used for years.