Translucent figure at an abandoned dairy in the village of Staro-Arzamatovo

Writing for the first time, don't judge me. I was a little shit about 7-8 years old in the village of Staro-Arzamatovo, not a village but a piece of crap (one street along the whole length of the village). On the left side, at the very bottom of the street, stood the ruins of old barns, granaries, cow sheds — because nearby there are giant fields for livestock and various agricultural crops. Right by the road stand the ruins of what, as I remember from my grandma's stories, was a dairy — looks like an ordinary abandoned two-story building, the first floor is about 2.5-3 meters high, with huge windows. So anyway, we were driving past this structure and I clearly saw with my own eyes a huge white semi-transparent ethereal fucking thing that was waving its hand at me as we passed. I would have forgotten this story as a kid's nonsense if not for the fact that this year I came to visit relatives and went for a walk with the old native villagers, the talk turned to all sorts of creepy stuff and NEKh, and I told a guy this story, and he in turn told me that they, while going to school near this dairy, saw this ethereal thing and complained to the teachers about it, the teachers went and looked and found nothing. I also saw this same fucking thing when it crawled out of the window of the long cow shed, crawled across the roof and went off to the other side of the cow shed and disappeared from view. It was creepy, it really was, to realize that I wasn't the only one who saw this NEKh.