This seems to be your first Grow?...
Back you light off, you don't need nutes untill you put them in 1 gallon container.
There is no point tring to "LST" your seedlings when they are that small...
Be patient all new growers try to do TOO MUCH.. keep it simple and if you have a 600w hid it should not be at max light untill 1/2 into flower and it should FINISH 3 feet away...
Best of luck
Keep good notes... you will improve over time
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