first time

hello iam currently doing my first little grow with 3 autos in a 50x90x5.5 ft tall space, in 3 gallon fabric pots,using bio bizz lightmix,under a kingbrite qb288 lm301b 240w full spectrum led,will be using mega crop nutrients at around 2-3 weeks, the temp sits around 22-25 degrees during the day at 75 humidity and about 18-22 at night with 50-60 humidity, iam also using still water brought from shop has a base ph of 7,3 and ppm of 90 i have lowerd the ph to about 6.2 and waterd 2 times with maybe a litre of water just wet the soil and have sprayed with water ever so often to raise humidity they are currently only 3 days old 1 of them with rapid growth (did have little longer in germination) and had a bigger tail then the others once planted. 1 of the seeds decided to grow upside down with tap root sticking out of the soil so i had to do some surgery if you can call it that ahaha all looks ok to me as a newbie I THINK just want to confrim my light is dimmed down to the lowest setting (not sure on the wattage) and sitting 21 inches away i will slowly brighten the light every other day once i see them ALL pop out a little above the soil my seedling thats has grown the most hasn't quite grown leaves yet looks a little weird to me (as shown below) or its just me maybe or is it just sooo young and me being a little impatient thanks for any feedback and will keep updated (them pictrures are from 2 days ago have grown more) 17th of may is start