Until you recover access to your AppleID, any attempt to reset your iPad will encounter “activation” - which will require input of your AppleID and associated password. Without working AppleID credentials, you’ll be stuck with a “reset” but unusable iPad.
If you have forgotten your AppleID or associated password, these can be recovered here:
https://iforgot.apple.com/
To recover your credentials, you’ll need access to any one of the following:
- Your primary email address mailbox that corresponds with your AppleID
- Any of the secondary/recovery email addresses that should be configured for your AppleID account
- Any of the trusted telephone numbers (fixed line or Cellular/Mobile) that are associated with your AppleID
Unless you AppleID account has not been fully/correctly configured, or has been seriously neglected, recovery of the AppleID and password should not be difficult.
More information about recovery of your AppleID:
If you forgot your Apple ID - Apple Support
More information about recovery of your AppleID password:
If you forgot your Apple ID password - Apple Support
When you recover access to your credentials, you would be well advised to log-in to your AppleID account from a web browser - and verify/update your secondary (recovery) email addresses and trusted telephone numbers:
https://appleid.apple.com/
Otherwise, you are running out of options - and this may be your final option of AppleID account recovery:
How to use account recovery when you can’t reset your Apple ID password - Apple Support