How do I sign on to a different iCloud account

See the article Turn on and set up iPad - Apple Support

• Your Apple ID and password; if you don’t have an Apple ID, you can create one during setup .

So create a new Apple ID How to create a new Apple ID - Apple Support and set up iCloud Sign in to iCloud on all your devices - Apple Support

Chiefjohnny Said:

"How do I sign on to a different iCloud account"

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Assigning a Different Apple ID to your Device:

90-Day Wait Restriction...

Wait it Out:

You have to wait up to 90 days before a device can be associated to a different Apple ID. So, just wait it out - once all is through with, then you can sign in under your own account. That's just the wait it is :(

Source: View and Remove your Associated Devices for Purchases - Apple Support. As it reads: "If you can’t remove a device, you might have to sign out of your Apple ID on that device or wait up to 90 days to associate it with another Apple ID."