First Auto grow

Where to start. Noticing quite a bit of nutrient burn on the white lsd due to my lack of experience. Lowered the nutrients a bit but I reckon the plants will only have about a month left till harvest, the caramelisous maybe 1 and half months, younger blue dream about 2-3 months. The caramelisous maybe got some rust on the leaves? Then it kinda started to infect the blue dream and lsd but that’s under control after cutting them off. Cleared the bottom branches of little sites/bud sites that wouldn’t of been anything. Can’t wait for that blue dream, the fruity smell is driving me crazy! Can’t wait to smoke it