password management

Good afternoon, I doing some linux practice here and I installed Fedora ARM64 on my m1 Mac and I am trying to become the root user using "su -" I do not know what that password is and I do not remember seeing it in set up. I tried on another vm and got the same issue. Is there a default passwd...

have something that can store your passwords, possibly remind you to change them after a certain amount of time passes or when your information has been part of a data breach (maybe this could be separate for checking if you've been in a data breach or not), ability to create random and strong...