I feel its its slightly too crowded for such short plants, especially if its your first. If you had a foot or so of stick, with no branches or leafs, under that cannopy you would be golden for airflow.
If you wanna flower like that you will be fighting a very humid microclimate in the cannopy. Get plenty of airmovement, dehuey or AC to control the climate and most importantly control your light out temps, if you have a lot of swing between hot day and cold night youll get humidity and mold. Look up lolipopping, its your friend in a dense setup.
What strain and how much stretch are you expecting? Is there a head room issue and thats why theyre so short?
Would you be partial to raise your lights and scrog a bit, veg another week and let them grow some more legs and defoliate the bottoms?
Id also rec get some fans in there, some standing pushing air towards the walls in order to not beat up the plants too much. You also need a fan over the cannopy, moving from side to side to prevent heat build up.
Props on your plants though they look real happy, green stems almost everywhere. Youre doing well for first time. But dont underestimate the change from veg to flower.
Keep posting the pics and everyone will help you thru it.
