I ordered about 25 bridgesii seeds,...and i know that while germinating them,...the soil must be really moist/humid.

Well, because it needs to be humid for so long during its seedling stage, im worried about fungus/mold growing in the soil while germinating

I heard about people sterilizing the soil first in an oven, but im worried it will still get mold indoor germinating since my house is DIRTY

So,...mushroom season is in 2-3weeks here in Oregon,...meaning it will be humid outside soon...Can i germinate the seedlings outside during the humidity/rain? And just take them inside at night to keep warm?

And how much light do they need every summer/winter? Where do i keep it in the winter here? Just in my window?

And how do i deal with mites? Spider mites thrive up here because it gets so dry, but am i able to spray the cactus with neem oil to keep them off?