How to reset my MacBook password?

we cannot do that, you need to do that

Change or reset the password of a macOS user account - Apple Support

Hi Namuuntamir,

As mentioned by Chris0107, we can't reset your MacBook's password for you. In fact, we're not even Apple Support - we're just fellow Apple product users like you.

Try the methods described in the article linked by Chris0107. If none of those methods work, please let me know - there may be another way to reset your user account password.