Newbie needing direction

Noob here. I played with HA back in 2020 a little then life got in the way. Anyway looking at doing a new install with the end result being a touch screen wall display. Maybe an old All in One PC. (something bigger than a tablet.) I have a NUC that I could install the server on, but wondering if that’s the best option since the AIO would have to have an operating system on it. If I use an old AIO as the wall display can it also run the server? If not, what would be the best OS to load on the wall display to connect to the server? Thanks