As usual, many pieces of good advice from this group. Ride in an area without the steep hills to start off. Getting your sense of balance isn't tough, mainly its a function of mileage accrued, at first. Even if you need to haul your bike to a flatter area, do so, you don't want to let where you ride, along with the little aches and pains, discourage you from riding. Once you have a better sense and feel for your balance, you can work on your strength an stamina, logging miles is the best way to get your cycling groove.

Bill