Oh man thank you so much man one more question what would be best soil for autos ?
That's a good question. You will get mixed opinions on this. There is no "best" in this hobby. Whatever works best for YOU is what IS best.
I followed A-trains advice and used what he used, Promix BX. It is a soiless mix of mainly peat moss, vermiculite, and perlite. I add an extra 20% perlite. He explains without nutrients in his ium, he has complete control of what is plants get.
I don't necessarily want to follow anyone's practices to a T. However, until I was comfortable in doing my own thing I did my best to mimic A-train. His massive harvests speak louder than any naysayers.
I will send you a link to son a good info he has to say about autos.1 sec.