Boomer shroomer on youtube has some great info. Thats probably for a more experienced user though. I've never had any problems using PF Tek. As a beginner, I recommend starting there, this method is more or less "fool proof"
Items needed: Pressure cooker. 1 or 1/2 pint "ball" jars - widemouth is best. Bag of vermiculite, bag of perlite, organic brown rice, large plastic "rubbermaid" tub, blender or coffee grinder, and of course, your spore syringe. The spores you get online - they're legal - atleast in most places in USA. Everything else you can find at a Walmart or around town. Also necessary - Kitchen utencils, alcohol to sterilize throughout process. Grind your rice into flour using a blender or grinder. A ratio of 2/3 cup vermiculite, 1/4 cup Brown rice flour and 1/4 cup water is used to fill the jars. Sterilized in pressure cooker and injected with spores. Kept dark and warm for a few weeks.
Follow these instructions:
https://erowid.org/plants/mushrooms/mushrooms_mmgg.shtml
I CAN'T STRESS ENOUGH: YOU MUST BE AS CLEAN AS POSSIBLE THROUGHOUT THE ENTIRE PROCESS! Or you will just grow mold/bacteria and waste your time/money!
However, when it comes to terrarium - do this below.
Fill the bottom of your plastic rubbermaid tub with about an inch or 2cm of perlite. Add enough water so that it soaks into all the perlite and theres some left standing at the bottom, but not so much that it goes above the perlite. This is your terrarium. When your jars are finished colonizing - the fungus grows throughout the whole jar with no discolorations - wait another week to be certain they are mature. Never open your jars until you wait a few days after you see entire jar colonized. Some are quicker than others.
Now you are ready to "birth" your "cakes". Empty all your jars ("cakes") into another tub half full of water to "dunk" them - let them float around for 12-23 hours - then place them in your terrarium. This helps tell the cakes that its time to make mushrooms, and the dunk helps to rehydrate your cakes, as mushrooms are 90+% water weight - this step helps alot.
With the standing water in your terrarium there will be enough humidity you should see moisture built up on the side of your terrarium - this is a good sign. Leave terrarium in warm dark place and check every other day, open lid for a few minutes for fresh air, and let sit in light for an hour or two, NEVER direct sunlight! After a few days you will see "pins" forming on your cakes. In a few more days the mushrooms will be ready. Pick them just before the cap splits from the stem. After your first harvest, you "dunk" your cakes again for 12-23 hours and put back in terrarium for the next
"flush". If terrarium starts to dry out, just add more water to perlite at bottom, but not so much that your cakes are sitting in water. Just enough to keep moisture/humidity high.
Your cakes will flush 2/3/4 times, just dunk again after each flush and repeat until no more growing, try not to handle your cakes and bruise them or tear mushrooms out when picking - don't damage cakes.
A food dehydrator works best for drying, but is not necessary. You can air dry with fan etc. Mushrooms must be BONE DRY and snap stem before they can be stored otherwise they will be ruined.
Each subsequent flush has a reduced yield and potency. The first flush is best, the last one is worst. Hope this info helps! o7