leaves are slightly curling

early leaves.. meh. if it is healthy otherwise, you can ignore it. if you want to dot your I's and cross your T's, make sure pH is proper. Oscillating pH can cause variance in growth rates, that results in 'wavy' leafes, but this sort of thing can simply happen to the first 1-3 sets of serated leaves. if new growth is clean and normal, all is well. This plant looks fine.

Nothing to worry about really, but it does need to go into a bigger pot asap.

Your temperature/rh is good at 24/68% and the light doesnt seem to be too close. Im using the same LED. Is it at 40% ? Probably a watering issue, nothing to worry about though. It happens on these young plants, it will most likely grow out on the next pair of leafs.

Curling is usually a heat/humidity issue. Too hot or too dry or both. In the second picture it almost looks twisted, which can be an early sign of a pH issues.

Leaves could be doing that because of heat or light, doesn't look like anything to worry about to me. I would want to get that plant into a bigger pot asap though.