Instructions are prettey clear on how to innoculate where you're buying them from... at any rate, if you're asking about fruiting the colonised substrate rather than how to innoculate it, your best bet is to research a 'shotgun fruiting chamber'. Consists of a plastic tub (as large as you need for both bags) with 1/4" holes drilled on all 6 sides to include the lid, spaced about 2" apart from each other. Picture a tub riddled with tiny holes from a shotgun blast...
Next step is to put about 3-4" of wet perlite in the bottom of the tub. The perlite will hold a considerable amount of moisture, and gradually release it keeping your humidity inside the tub around 90-100% which is ideal. All of the holes in the tub will allow for FAE (fresh air exchange) and allow the CO2 to seep out of the bottom holes of the tub. 3-4 times per day, open the lid and very gently mist the sides of the tub (not the mycelium of the shrooms themselves) and then fan the tub with the lid for a few minutes. This will also increase in FAE and induce evaporation from the colonised substrate which is the trigger for pinning, and then fruiting.
Once your substrate is fruiting, if your caps are dry and cracking, increase the relative humidity inside the tub (I usually try to keep around 95%) by misting more often or re-wetting your perlite. If they seem slimy, of white fuzz starts creeping up the mottoms of the stems, increase the number of times you fan per day as they're not getting enough air.
Vermiculite/peat based casings are recomended for bulk substrate to retain moisture, but if this is your first rodeo, I'd try to keep it a bit more simple till you get your feet under you.
Only other suggestion if you're trying to go stealthy (not cooking even simple BRF jars on the stovetop) then innoculate with any sclerotia forming spores rather than cubensis. These will grow inside the bags without ever even having to open them. Just innoculate and wait a few months.
Hope this at least answers a bit of what you're looking for.
