My that blog is a mess. I want to start a new version of Lightroom. and I don’t care about losing edits

my catalog is a complete mess. I’d like to start a new version of Lightroom, and I don’t mind losing any edits. Most of my photos are in my iOS library and in my picture folder. so I would like to start a new clean version of Lightroom using smart previews and not uploading photos to the cloud.
I might add that I’m 81 and my brain is not what it used to be. I use Lightroom and photoshop mainly to correct very old b&w photos as well a recent iPhone photos.  So I am not a complete beginner!