You should be able to reset your password by clicking 'Forgot Password' here while logged out. If you can't log out, try from an incognito window.
If you haven't received the reset email, make sure to check your spam folder.
If it's not there, consider whether you originally signed in using a different authentication method such as 'Continue with Google.' If that's the case, there's no password to reset; simply log in using that authentication method.
If you need to reset your Google or Microsoft password, you'll need to do so on their respective sites.