I've had my fair share of mushroom growing in Minecraft, and it's actually pretty simple. To plant mushrooms, you just need to find a suitable area with the right conditions, which is usually a dark place with a block of dirt, grass, or podzol. Then, you just place the mushroom on the block and make sure it has enough space to grow, which is a 9x9 area around it with no other mushrooms. Also, keep in mind that mushrooms won't grow if the area is too lit up, so make sure to plant them in a dimly lit spot, and they should start growing in no time.