I've tried this before on my own and feel miserably, so I'm hoping I can get some good advice here.

My plants are currently at about two weeks and they're under a total of 1600 Watts in a 4x4 grow tent.

I've got a fan going, a humidifier to keep it best I can at or a little above 32%.

I've got an exhaust fan I've been keeping the temperature in the tent between 70 and 80°.

I've already topped once, a second topping May happen depending on the advice I get here.

I just went ahead and placed my net, and I absolutely do not know what to do at this point if anything. Another issue is that I'm using very high in soil. I have a bottle of nutrients arriving this week and wondering if I'm using premium soil should I even bother with adding nutrients?