Hey there, I am pretty new to autos as well and have a good amount of experience with photoperiods.
In your last picture I noticed that it seems a bit droopy and almost is looking nutrient burnt, I am just curious how much you amended the medium, or if you're using the same dosage as a regular photoperiod.
I've noticed that when I use like 1/3 of the lowest reccomended dose for most of my nutrient line ups, that my autoflowers have been responding a lot better to that in frequent feedings, as opposed to a once a week type thing. I've been doing a little bit every 2 days and it's working out a lot better.
Again, sorry! I am super new to Auto's too and just wanted to share what has been working best for me
Good luck and happy growing