Wondering what I should do for my leaves turning u...

Yes leaves are curling up from too much heat. Spraying with the light on could worsen the condition creating more heat on the leaf surface so stop that. If you spray when the light on you need to add a surfactant like gentle soap otherwise just do it before lights on or just as it goes off. Can’t really see the setup much as you only have a few pics. I can see it’s a micro grow. I’ve done a few micros in the past. Heat was always an issues especially when I lived. If you could get yourself a 4” RVK fan and some tubing you could put it on the outside of the box. My guess is that this will help dramatically. In reply to your watering. You should try and water the whole medium I soil especially canna professional which is great IMO don’t water with too much run off and keep your nutes 1/2 strenght till the 6th week of use in the soil. Then do a flush and go to 2/3 or full strength as most of the nutrients will be spent in the soil. At this stage your watering seems to be on point. Wait for the soil to dry lift the pot it will seem light then water it. I will follow along as I like a good micro grow!