How do I find and access my iPad backup in iCloud?

Got it. You turned on the setting to backup to iCloud. You can check the status of your backup in settings - Apple account - iCloud - iCloud backup. That will provide you the last backup time. Should you need to restore using the backup you can factory reset your device and set it up using the backup.

Backups made using iTunes are stored on your computer. iCloud backups are stored in iCloud. Should you need the reset and restore your device, you can select to use the backup the you set up the device as new.