Windows 11 has been available for some time as an update on compatible Windows 10 systems, so your next step should be to check whether it's already available on your PC. In Windows 10, go to Settings ...
Similar to the Windows 11 system requirements bypass method, a tech enthusiast managed to run Windows 10 22H2 on an old unsupported CPU using a trick, though it won't work for everyone out there.
How to upgrade your 'incompatible' Windows 10 PC to Windows 11 - for free ...