Another attempt - RQS Fast Eddy CBD

I'm at the beginning of Week 2 (AUTO-FLOWER), I'm trying to do some LST, little bending and nothing more. Can anyone please say if I'm doing everything correctly? I don't want to stress my lady, and I also won't do it bad way. I will be grateful for every tip!

I have following problem with some bottom leafs. I use nutrients from Biobizz: Grow, Bloom, TopMax, CalMag, ph Down. Water pH is 6.5, feeding amount like in Biobizz chart. Middle and top of plant looks ok. Light schedule 20/4 (4h is dead zone). Is this fungus? Remove those leafs?

After last question with those symptoms, I flushed her with pure 6.5pH water, then next time started to adding only Biobizz Fishmix, and another next time I started to add all nutrients again but 50% of recommended. Buds, the white ends of the flowers begin to turn brown as well.