Put seeds on very moist peat based compost in a little pot. Make sure the compost is totally drenched. Then put the pot in a zip lock plastic bag. I sat mine on a south facing windowsill on a ledge that gets alot of heat from a radiator nearby.
Every week, give it an open and mist it with water. You want to maintain a very moist atmosphere in the bag. Near 100% humidity seems to work just fine. 2 month later, here’s the little critter.