Thanks for reaching out. We are here to help. I'd love to help you figure this out.
If you wish to keep working on Lightroom & Lightroom Classic with the sync ecosystem, you can enable the sync in Lightroom Classic, and all the images in the Adobe Lightroom (Cloud) will be downloaded. Check this to help you get started with this workflow: https://helpx.adobe.com/lightroom-classic/how-to/sync-photos-lightroom-mobile.html
If you wish to completely move your work from Lightroom cloud to offline only in Lightroom Classic & later have the ability to selectively sync images to the cloud, you can find my recommendation to help you move from Adobe Lightroom to Lightroom Classic on this community thread: https://community.adobe.com/t5/lightroom-ecosystem-cloud-based-discussions/about-cloud-storage-image...
We hope this helps,