You're going to get some conflicting info about growing pot. All grows r different and many ways to the finish line. Take what u can, and leave the rest behind. Adapt and overcome!!!!

Looks like overwatering and light is to close, you want those little leaves reaching for the light, do not feed much to small, don't water every day, I water around the seedlings till they can stand on there own then give a proper watering and check ph.