First time having manual brakes, are mine bad?

I just got my Dart and it is the first vehicle I have driven with manual brakes. Disc front, drum rear. I have to stand on the brake pedal, hard, just to come to a complete stop. Does that seem normal? I am ordering drilled slotted rotors for the front, new pads, then new shoes for the rear. Going to give them a good bleed and go from there. But at this point I have no idea why someone would want manual brakes!
That doesn't sound normal. Tell us about you. Are you a small guy or girl with not a lot of lower body strength? No disrespect meant, I'm just askin as I caint see you. We need to make sure it IS the car, after all. Generally speaking, these old cars stop reasonably well. My 64 Valiant for example has the aforementioned 9" manual drums all around and it stops VERY well for what it is. My wife even likes it. I think from your description though, it does sound like something is wrong with the car itself. But if you're only like 5' 4" and 110 pounds, that could have an effect too.