You need to loosen the hoop clamp all the way and slide the pedal onto the hoop as far as it will go. That's how you get the beater closer to the drum, by moving the whole pedal closer to the drum. Also extend the beater to its full length and that should help.
Sometimes the hoop clamp doesn't fit very well onto the hoop. I've got old
Pearl drums and the hoop has a groove in it, so I have to add some cardboard under the clamp so it will tighten properly. You may have to McGyver your pedal too.
Good luck!