I grew up in a very urban area and learned to drive in about 3 hours when I was 21.
Mastering the correct connections between situational awareness, unconscious motor responses to the various stimuli required to be a safe driver will take a significant number of hours behind the wheel, and you shouldn't endanger anyone else while you acquire that mastery.
Hopefully this was a long time ago and you have accumulated the hundreds of hours behind the wheel without incident. But you did not 'learn to drive' in three hours, you learned to operate a vehicle. The learning to drive part happened after that.