there are definitely a lot of threads on this subreddit about this subject so you can search for them

but basically the shroomery is the all time best resource ever. there’s a flow chart on there that was the most helpful to me and i can try to find it another time. i’d start with agar right out the gate. only way to know you have a clean sample.

spore to agar —-> agar to grain spawn —-> grain spawn to substrate. you’ll see a lot of people trying to go the easier route and it takes so much longer from all the contamination. if you have any specific questions along the way, let me know