how do I reinstall Ventura over Sonoma 14.1.1

You create a bootable USB installer from Ventura, boot from it, erase the drive, install Ventura, then use Migration assistant to bring back files from a backup made prior to installing Sonoma.

How to download and install macOS - Apple Support

Create a bootable installer for macOS - Apple Support

Use Disk Utility to erase a Mac with Apple silicon - Apple Support

Use Disk Utility to erase an Intel-based Mac - Apple Support

Yes I am having trouble with Safari just not searching. Unable to get in to my YouTube account also for instance when using my bookmarks . ..or a google search. Error 400.

I am able to use all other search engines without a problem.

I hope my keychain still works on those Search Engines . .I haven't tried that yet.

I have read the 4 pages of the forum 'Safari problems since Sonoma upgrade'.

There has only been one response from Apple and that was on the 1st of October.

I too have been an Apple user since the mid 80's when I was a teenager.

Thanks for the post Barney-15E and Zora193