I cannot login in after a fresh install, don't know root password, and it never asked me to create a user

[Frank Hale]

> We old-timers are the ones who insist on setting a root password :-)

I find that all the crap I've learned so far using linux has hindered
me from adapting to new ways of doing things. I started in 97 and even
to this day there is so much I don't know. For instance I'm about to
ask a really dumb question. Since I already set the root password and
have been using it, is there a way I can disable the root account so
that I can train myself to start using sudo?