Grabb it .
Your dad is pretty much right, you do steer them off the back wheel and the front wheel is only there to keep the engine off the ground.
That is a speedway analogy and is only part of the explanation. With dirt track there is a lot more changing direction and the front wheel has more work to do, but don't rely on there braking ability.
Having said all that, don't be put off as they are good fun to ride, when you get it right.
As Jim said, if you're not interested please let us know.
What State are you in?