If you’ve joined the Windows insider programe you can install Windows 11 22000.51. I wouldn’t recomend this on a computer your using for work, and only if your happy to reinstall Windows 10 from scratch if it fails.
If you don’t have a TPM chip it might be more difficult. It is possible with a few lines added to the registry.
When I tried to install Windows 11 on my old laptop without a TPM I got the message, This PC must support TPM & ThePC must support secure Boot.
I now have it running on my old Acer Aspire 5741 laptop with an i3-m330 and 4gb of RAM and a Crucial SSD. Dont try this at home unless you know what your doing.
Using the registry editor go to; HKEY_LOCAL_MACHINE\SYSTEM\Setup, here you can create a key called LabConfig. In this key you need to create two new DWORDs
BypassTPMCheck – 00000001
BypassSecureBootCheck – 00000001
Save this and then reboot and try reintalling Windows 11 from the update menu. I was surprised that it worked on such an old laptop. The performance is much the same as before And I get to try out Windows 11.