Mystery Strain 3 week clone

Picked up a clone from one of my buddies this past Thursday. He says the plant is about 3 weeks; which I was hoping to obtain some confirmation from more experienced growers here on Reddit. I figured the plant was ready to transplant at the very least. He was using pro mix and mother earth dry nutes, but i'll be transplanting to coco perl at 70/30 and using cal-mag with the flora trio. Just from looking at plants all day today on Reddit, I haven't seen one that looked like this so young? He had his light extremely close to it. Is it looking alright so far? I've read through the beginner thread already but just wanting it to thrive being my first grow. I have a 1000 watt mars hydro LED and also a 25 w blurple at 24''. The 1000 w is at 36 inches above the canopy and i'm running it 24/0. My friend also doesn't know the strain?? Humidity has hovered between 45-40 RH for the last two days, and my temps are from 73-77 F. I wanted it to stretch a bit taller before transplanting and starting LST. Any suggestions? I am currently feeding 1ml cal mag, 1 ml general hydroponics of micro, and then 1 ml of bloom PH is at 6.5.