Just my unprofessional opinion: I think with enough hands-off time it will bounce back, perhaps. It's easy to over-water, over-fertilize & over-everything in the beginning. (I'm on my first grow too so I totally get it). The cotyledons look good, it's just the leaves that are a bit droopy. I say just keep giving it light every day--back off the water & nutes for a while & see what happens.
I only use my LEDs as a supplement to windowsill sunlight so I don't know much about that aspect...how far or close they should be, etc. As long as they're not getting too hot & there's good circulation in your grow area you should be okay in that regard. They don't look underwatered or light-burnt IMO. I think they tend to curl up & "taco" or get crispy/yellow when that happens. This looks more like a water/drainage issue if anything. But I'm not familiar with nutrient deficiency/burn or pH symptoms so it could be that I suppose.
TL;DR - Give it a chance to bounce back by doing nothing. If it deteriorates, it wasn't meant to be. If it gets better, you'll be glad you didn't throw it out. Cannabis is a weed after all. It's pretty resilient when left to do its thing.
... whoa, that's a weird reaction there, all yellow veins,... something might be wack' with the water or the soil, bad batches happen,... how close were the lights initially? Dry is bad news for seedlings, they need consistent even moisture, and less intense light,...24" min with those lights! ....that said, the lights may be part of the problem,.... get us normal light pics too please, LED is lousy for diagnostics,.... do you have a pH meter and a TDS/EC meter? I'd test the Biobizz right out of the bag, prep'ed the same as you did for the plants,.. make up a a liter of it, moisten well, and let it sit for an hour or so,.. then water with RO/Di water until you get a few oz's of run-off,... test it for pH and TDS/EC......this may offer a clue!
