Advice Please-

I read somewhere before that if you use pollen on the same plant (feminized) it came from that it would hermie. My question is if I was to clone it, then when ready pollinate the clone would it hermie as well. Also another question, what would be the minimum amount of time a 8week autoflower would have to be pollinated until it produced seed? And if time isn't on my side, could I just harvest all of it except the pollinated branch until however long it takes? Thank you in advance.