If you are learning how to actually ride a bike, It might help if you were to to take the pedals off, go somewhere where you won't get involved with traffic, like maybe a park or something. Find a slight incline & go to the top, mount the bike then go down the slope and gently learn to balance and to use brakes.

I think we have some adult bicycle classes for folks who don't know how at all and that's how they start. If you're learning how to balance & slow down you don't need to worry about pedaling at the moment. I say this assuming that you really cannot ride a bike. I apologize if this description is too simple for your current situation.