So first things first..... rise your light, ifts way to close,, 70 cm is the sweet spot.
For a first grow its absolutely ok..... plants are alittle stressed. ph swings, burnt waterdrops and some lightburn on them... but alltogether quite good
if you rise the light... plants will look better immediately. giving them abetter VPD will help them too ( 75 percent RH))
keep on growing