My first grow

Biggest frustration this week is my other two plants are starting to show nuts burn from the ffof (definitely lesson learned for grow 2). I'm thinking a part of the problem is perhaps due to the fact that I was worried about over watering so I haven't watered until runoff in the past, maybe creating some extra hot soil toward the bottom of the pot? I've started watering heavily once the soil dries to hopefully flush out all the extra nutes still in the soil. I also moved my light higher as i was noticing some stress and slow bunched up growth (thanks to someone else's question I found this remedy). I began lst with one of my plants, hopefully this gets smoother as i continue. No breaks, but its super stressful for me and I'm sure I could do a better job. I will begin lst with my other plant shortly. Finally, I think I'm pulling the plug on my 3rd plant as its well behind the other two and I want to shift all of my attention and resources to the stronger plants. I was hoping just for 2 of the 3 to germinate, so I guess this will put me back on track!