Look for a commuter or hybrid bike from the local bike shop. Both will have 700c tires that are fast and efficient on the road. Google " bike shops xxxxx " with xxxxx being your zip code. You want to practice ridding more before you get out into traffic.
http://bicyclewarehouse.com/product-list/bicycles-cross-hybrid-62/
http://www.schwinnbike.com/usa/eng/Products/Commuter/Commuter-Trekking/
http://bicyclewarehouse.com/product-list/bicycles-cross-hybrid-62/
http://www.schwinnbike.com/usa/eng/Products/Commuter/Commuter-Trekking/