iMac Bootcamp partition

I bought an iMac computer some years ago. I had been told in the Apple shop that I could use Office for Mac but it did not enable the use of all Office stuff which I was used to in Office for Windows.

i created a partition and installed Windows 10 via Bootcamp.

I have never adjusted to Mac as I had been with Windows since 3.1! I later bought a Microsoft Surface with Windows 10 installed.

Now Windows tells me I cannot install Windows 11 on the iMac. Wish I’d never bought it!

Is it possible to get rid of the Mac partition and turn the computer into a Windows PC? If so, would I have to purchase Windows 10 before upgrading to 11?

If this isn‘t possible, how do I upgrade to Windows 11 on the iMac?

Sorry for the rant but would like Windows 11 on my computer!

Thanks

I'm not sure about putting Windows 11 on a Mac I've only ever had Windows 10 on my old Macbook air, but if it's an old machine it probably won't pass the hardware requirements for Windows 11.