Good morning can you please tell me how to separate my devices from the same Apple ID

I'm not sure why you would want to do this, but I would just sign out of iCloud on the device and then sign back in on that the device with a new Apple ID. (Perhaps restart that device first. Be aware the iTunes and App Store purchase are permanently tied to the Apple ID they were purchased under and cannot be transferred. ZSee the "If you want to sign in with a different Apple ID" section in:

Change your Apple ID - Apple Support

Also see:

What to do after you change your Apple ID email address or password - Apple Support