Has the seed cracked?? Have you soaked it in water or moist paper towels??
If the seed has been germinated and is showing a taproot..plant it 10mm deep with taproot pointing toward the bottom of pot, water the soil..put the pot somewhere warm and dark..Dont SOAK the soil or you could get mold issues..The most important thing is to not let the soil dry out.
It should sprout within a day or two, so you shouldnnt really need to water again until it pops its head outta the soil