propagating the sacred fig (ficus religiosa) with seeds isn’t difficult. you can use a good regular potting mix. give the seeds just on the soil. to increase humidity put a glas or a freezing bag over the pot. don’t forget to air daily. place the pot on a bright location without direct sun. temperature should be +20 °c/68 °c. keep the soil moist but not wet.
the sacred fig needs approx. 7 to 21 days to germinate (at 25 °c/77 °f). if the seedlings are approx. 5 cm/1.97 tall you can start slowly adapting them to your room climate with extending the airing time day by day. when they are 10 cm/3.94 inches tall they can be divided an re-potted.