Ok, just joining the show but haven't read through all the comments so bare with me.
Lets see, first off, id recommend not watering and feeding daily. Even at half strength. Let the soil completely dry out. Straight water it no feeding, make sure you completely soak the soil, let it run off a good 30% or more of the water you put through it. You are not going to drown it .
Then let completely dry out again. Now on the next feeding, go ahead and give her full strength, next one straight water. - rinse and repeat.
Its an Auto so definitely don't top or anything like that. You don't want to shock the plant since its an auto. Id leave the lights running atleast 18hrs at a time. I ran my autos under 20/4 personally, and that was only to let my LEDs have a break otherwise id of ran 24/7.
Speaking of LEDs, you need to get yours closer to your plant. 8-10" above plant is perfect. My first grow was actually an Auto. Was a ton of fun, didn't get very big. Much like yours is before it started to flower. But it was the beginning of a wonderful hobby.
Biggest two tips I can give, don't love your plants to death, and don't chop it down too early. Let those hairs actually recede back into the plant. You'll know when.