As said, grow your own. No need to deal with risky characters, you'll know exactly what you have, requires very little space, low risk as long as you can keep your lips zipped. It's about 6 weeks from inoculation of spores to first harvest, and the total investment to get started can be about $100, most of that for one-time expenses. Spores are legal to buy in most (47) states, and can be ordered from the open internet. If you're in one of the 3 non-legal states, or a non-legal country, there are online spore print exchanges. After buying once, you can propagate from your own spore prints, or from clones.
I would not rely on Reddit for your cultivation advice. Try shroomery.org, an old school web 1.0 forum that's been around since 1997. People who have participated there for years and are recognized as experts are marked with a "Trusted Cultivator" badge. Yes, it is actually possible to grow shrooms on Uncle Ben's precooked microwavable rice packets, but it is not a recommended practice due to high percent of batches lost to mold/bacterial contamination before the spores can germinate. It's just too wet of a substrate and doesn't have adequate airflow for oxygen that the mycelium needs to grow. I have tried it even though I usually use more advanced techniques, and lost 4 of 8 bags to contamination, even though I used above average sterile handling methods.
The PF Tek method is considered a reliable method for beginners that minimizes the equipment you need to buy, and is recommend in the shroomery.org's "getting started" sticky thread: https://www.shroomery.org/forums/showflat.php/Number/2442017... The thread also has links to spore vendors who have been vetted as reliable.
There is a also a discussion forum on the site for those who choose to use shrooms medicinally, including microdosing, recommended micro/macro dosages and dosing practices, etc.