What do I do now, if my car was out of all coolant and I put more in now.

If the vehicle was completely empty on coolant there is a leak somewhere. after adding coolant you may be able to drive short distances but not recommended as the more driving you do the more likely you are to have overheating. If the vehicle over heats it may cause damage to the engine. The best way to do it is do have the vehicle towed to a shop to have it diagnosed to avoid having larger issues.