Do what Lola said for the lights. As for nutes, it is suggested you don't start nuting until the 5th node at least. Seedlings are very susceptible to nute burn so I'd be very cautious if you decide to do it.

IMO, your soil looks pretty wet, the "wilting" or "droopy" leaves there are quite possibly from over watering. Let the soil dry out before you next watering and they will prob perk up.

Goodluck