i have recently aquired like new dell 5400 AIO desktop. updated it to windows 11, but am MUCH more familiar with OS. can i load an OS onto this machine and use it like that?
What CPU does your Dell 5400 AIO have?
10th Generation Coffee Lake (Core i3-10___, Core i5-10___, Core i7-10___, Core i9-10___) )is fully supported, later ones not so much.
You can get more advice on The Hackintosh Thread https://forums.macrumors.com/threads/the-hackintosh-thread.1900326/
It is more recommended to install macOS as a virtual machine on Windows 11 if you are not a tech savvy. The process is much more complicated and time consuming to install macOS on a Windows 11 machine natively. Make sure back up the important files on the PC before proceeding.