It is difficult for other users to understand exactly what you need help with unless you ask a specific question and provide as much detail as possible.
If you are asking how to reset your device with a forgotten pin, you will need to access the recovery menu and perform a factory reset on the device. Please be aware you will lose any data that is not backed up. Resetting via recovery will initialize the FRP lock, so be sure you know the credentials for the associated Google account. You will have to enter the Google account password correctly to reactivate the device after reset.
