Are you only going to be using Lightroom CC, or will you have Lightroom Classic CC as well?
You can migrate all your Lightroom Classic catalogs in to your new account in Lightroom CC. The option is available in Lightroom CC under File. Select Migrate Lightroom Catalog, and choose the catalog with the pictures you want to migrate.
Hi Jim, I don't plan to use Lightroom Classic once I have migrated.
All you will need is the Lightroom Catalog, Lightroom Previews and Smart Previews files (all usually located in the default Lightroom Folder in Pictures/My Pictures)
Along with access to the original files.
Launch LrCC via your account and from the File menu select Migrate Lightroom Catalog.
Read these recommended steps too: Migrate photos and videos from Lightroom Classic CC to Lightroom CC