if someone doesn't know, just ask :)
the soil should be moist, not soaked, so just water the soil once and wait; a spray bottle can help keep the soil moist.
when the seed germinates, it starts to absorb the water it needs through the humidity in the air; it takes about a week to start absorbing through the roots. to speed things up, you can use mycorrhizae.
pay attention to the temperature; 24° Celsius is perfect, if it drops, it struggles a bit.
and the humidity in the box should be at least 65% or more...