As you have experienced, using the front on a corner straightens the bike up, useful if your about to hit a road object.
Rear brake will square off the corner but if used too hard, will slide then high side if the wheel grips suddenly.
Its a good learning curve if you survive your mistakes
I vividly remember taking a corner at 75 and there were grockles stood next to their parked car on the road, in a blind bend with their doors wide open admiring the "view". That was a bum clenching moment and I just used my rear brake to slow, abet with a 50ft slide and managed to square off the bike, accelerate and miss the car.