if pot is large, just becareful in a week or so when you start feeding regularly...
coco is buffered? seed is packed with endergy for 7-14 days. little plant = little appetite, so don't fertilizer areas with no roots.. stick to rehydration until cotyledons show a hint of yellow. then, coco you feed nearly everytime.. again, since plant is small, i'd fertilzier near by and slowly expand... do keep it hydrated otherwise. In a big pot, you likely won't water again for quite a while. slight ebb and flow dryness liek soil, but not as drastic with coco. it requires more frequent watering compared to soil and especially early don't want the top layer drying out. moist is good.
if it is buffered the roots will find plenty of nutes already there. allow them to grow out. reading the plant is the best way forward. the cotyledons are throw-away leaves anyway. they don't get bigger even if you keep them green.