Beta testing requires good technical knowledge & best done on a spare device.  Win11 will also work best on newer devices esp. with new TPM 2.0 requirement

How to get Windows 11 | PCWorld

You’ll need two things: first, a PC that meets the minimum hardware specifications of Windows 11. Second, you’ll need to join the Windows Insider program so that your PC can receive the first beta or Windows Insider builds of Windows 11.   We would very much encourage you to read our earlier story on the Windows 11 minimum hardware specifications, download Microsoft’s app, and check to see if your PC is eligible to upgrade to Windows 11. If it’s not, there’s one loophole that may see you through to Windows 11, which we’ll explain as part of our next section.