Keep your soil moist, NOT wet, and wait! It could take a couple of days before you see the seedling. You'll want to have high humidity for the seedling when it appears - make a clear plastic dome with some holes in it since the little one will also need access to fresh air... or do what I do... I soak a rag or some paper towels in water and encircle the seedling so that the top of the rag or paper towel is higher that it and keep THAT moist/wet... that will provide the humidity and when you water IT, that will give the soil a little bit of moisture and keep the soil that is right next to the seedling moist as well. Overwatering (the state of being constantly wet) is the big danger for seedlings...
Good luck! Exciting times!