Help with seedlings falling over and dying :/

I agree with @harbingerofharvests new growers tent to over think things. It’s called weed for a reason. Lol I see you have seedlings in rather large pots to start, this is your first mistake that lots of new growers make, thinking they will skip the transplant issues and end up drowning there seedlings. Next time try using starter cups instead, it is much easier to get a good wet/cycle going at the seedling stage. All you can do now is let it dry out completely and then only water under your seedling around the base with a small amount of water at first, it should be dry again in 24-48hrs or so then repeat. As it gets bigger you can add more water, if it takes more then 2 days to dry add less next time, if it takes less then 24hrs to dry then add more next time. Next is your seedlings are stretching for the light, so bringing your light down closer will stop them from reaching for it, also a light breeze on them will force them to toughen up as well. If you would have started them in starter cups you could have just bury the extra stem on your next transplant in the new soil, but since you are already in large pots all you can do is try and fill you pot with more medium to make your stem shorter again. Hope this helps! Cheers💨