The only working method to go from the Pro edition of Windows to the Home edition is to backup all your files, then create a bootable Windows 11 USB and use that to clean install the Home edition, no other method will work, and if Windows Home came pre-installed on your PC, it will activate automatically after the installation.
Click this link: https://www.microsoft.com/software-download/windows11
to download the Media Creation Tool (Click on Download Tool Now), with that you can create a bootable USB flash drive on an empty USB flash drive (min 8GB) using that tool
Then, Boot your PC from the Installation Media you just created (change Boot Order in your BIOS) to begin installing Windows 11.
During the installation process skip the steps which ask for a product key and select the option 'I am Reinstalling Windows 11 on this PC'.