You can certainly create an additional AppleID account. However, unlike other computers with which you may be familiar that support multiple user profiles - other than “managed” educational environments - OS/iPadOS devices are not designed to be used by multiple identities.
Be aware that if you sign-out of iCloud and other Apple services - and use another AppleID to sign-in - you’ll not be able to change back for 90-days. This restriction, intended to prevent account abuse, cannot be bypassed.
Unless you fully understand and accept the implications, you would be well advised to reconsider your intended use of iPad with multiple identities.