The people here are very helpful indeed, but they do need a way to find your journal, or you. I mean try subscribing to other peoples journal, ask for advice or just let people know you are around because there is no other way they can find out about this grow.
Progress so far seems good. I see a pH imbalance or some sort of over feeding happening with the burns and the rust spots which are usually a mg/ca deficiency (could be that the ph is too low).
If you see the burns progress flush her. A good feeding schedule is water-feed-water-feed and so on if you feel that you have been overdoing it.
The thing with autoflowers, they really dislike food, just the medium is enough to keep them happy. There are some strains that enjoy a full feeding schedule but so far I haven't met any
Also try some organic alternatives, they're easy. Just bake some banana peels with some eggshells for 20 mins in the oven, after grind them up in a fine powder and mix with water and some molasses, and there you go cheap organic food rich in P K and Ca. The best thing with organic food is that you don't need to adjust the pH.
She will indeed fill up more, think of a way to support her branches because they look a little thin and they will bend under weight, like some sticks (bamboo are cheapest).
Keep up the great work!