How do I associate the right Contact Card under Users & Groups to my own profile? Just got a Mac for the first time...

Under System Preferences > Users &amp; Groups, I have a user profile set as the Admin.

My Full Name and Apple ID are shown correctly. However, when I click on the "Open" button next to "Contacts Card", it thinks that this user profile is associated to the contact card of another member of the family. How do I change that to my own Contact Card?

The consequences of this wrong profile is that whenever I install a new software and I get asked for my name, it keeps putting the name of the family member by default. I also had to go back into my Mail, Contacts &amp; Calendars settings where the full name field was filled out with the family member's name although the accounts were set up correctly.
You don't need iCloud.com to do this.  Open the Contacts application, select your card entry, click on the Card menu, choose "Make this My Card"