Windows 11 will reportedly display a watermark if your PC does not support AI requirements.
(www.tomshardware.com)
If Linux really, really isn’t an option, you should consider switching to Mac. It’s still really similar to Linux (given it’s unix based), and doesn’t try to screw you over constantly like MS & Windows does.
I’m in the middle of divesting myself of all Microsoft products, and I will never, ever go back to Windows after the near-weekly horror show that Windows 11 has been. I’m still on Team Linux, but Mac is by far the next runner up.