need to reset my macbook password

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

Although I understand you do not want to reset your Mac's login password, for reference please read Reset your Mac login password - Apple Support.

If it's an Apple ID password you need to change, Change your Apple ID password - Apple Support.

If you forgot its password, If you forgot your Apple ID password - Apple Support.

If you totally forgot everything and don't know what else to do, Recover your Apple ID when you can't reset your password - Apple Support.