How to reset admin password on MacBook Pro?

Hi,

Following article could help your question.

If you can't reset your Mac login password - Apple Support

kehende208 wrote:

When I press command R a locked lock appears

is this what you are seeing?

if yes, that indicates that the Mac has a firmware password set. if you cannot remember the firmware password, your only recourse is to bring the Mac, as well as your proof of purchase which MUST be in your name to your local Apple Store, or an AASP and have them remove the firmware password.