I spent around a year reading everything I could on here, the Shroomery, Mycotopia, collected equipment and materials slowly and mixed all the parts I learnt together. Unfortunately I am not great at documentation so I will probably have to do a lot of reading again next time!
This was all from a part of a syringe (self-made from a spore print), just a few mL used. You don’t need much at all to create far more grain liquid culture than you will need.
Key parts I think were: using rye (pre-soaked with water/gypsum) grain liquid culture to start off (initially worked with 2 or 3 small jars [in case of issues], chose one for GLC, chuck the rest), then I innoculated rye (pre-soaked with water/gypsum again). Then went to a mix of cow poo, coco-coir, vermiculite, coffee grounds (magnesium sulphate too maybe if I remember right?). I don’t think anything else was in there off the top of my head. I don’t think I would work with large amounts unless I was using liquid culture, it gives you a good head start.
I used a 70x40x30cm box to fruit in. I was working at home all the time I was growing so I imagine the near-constant attention may have been useful.
Other things that helped: making a good still air box, good general sterile practice – masks, gloves, bleach-based spray, IPA, self-sealing ports on jars etc.
I think it was very easy really, just a lot of reading and paying attention to keeping things clean. I think I could have got quite a bit more than I did, there still seemed to be a lot of life in at 3 flushes.