Given your starting point, you have a way to go. But lets get started with some basics.
- You should be able to lock the front brakes in an emergency stop.
- In an emergency stop the front brakes will do about 70% of the stopping and should lock up before the rears to prevent spinning out of control.
- Your car may need only some adjustment or it may need repairs or it may not have been assembled with the correct components in the first place.
- You'll need to share some more info for us to help you work through the process.
To begin with, please post a photo of your brake pedal assembly. We need to see if you have a brake bar adjustment system. Next, we need to know if your car pulls left or right during hard braking. And third, when you bleed the brakes, get a look at the brake pads and see if they appear wet or glazed. . . . Keep coming back here until it is stopping correctly.