Second grow, First indoor

What up everyone this will be my second grow but first indoor and kinda wanted to post in here and see if anyone has any advice or tips for me. My first grow was 3 plants out door with 2 being female and they’re about another 5-7 weeks from harvest just from guessing. They are Sativa dominate and just grew from bagseed. Well to the two plants I’m starting the journal for, also bag seed. They started germination the evening of 9-5-19 and put in soil on 9-7-19. They are under a 900w led and room kept about 72-75° with 50-55 rh. If anyone has anything to help I’m all ears! The first pic is 8 days old and the other is today at 14 days. Thanks!

Look fine but a long way to go. I hear LED sometimes cause plants to need CaMg. But don't overdo the nutrients. It's easier to add than subtract. That's my suggestion.

Update, plants growing decent but not really the size I thought they’d be now. Also the edges are starting to curl for some reason