If your system is compatible, you’ll get a pop-up stating “This PC will run Windows 11".Click on the blue coloured “Check Now” button on the Windows 11 banner.
Click ‘Update & Security’ then ‘Troubleshoot’. To do this, click the Start menu, then click the cog icon on the left, which will open up the Settings window. This can also reset the Windows Update app, which can help kickstart the installation. Windows 10 has a built-in troubleshooter that can help identify any problems. If you're encountering problems installing Windows 11 via Windows 10's update tool, don't panic.
How to fix Windows 11 installation problems