Well first off I want to say welcome to AFN.
Well it looks like you got yourself a couple of plants going there.
I don't know how tall your ceiling is?
but they're pretty tall. with the light just above the plants. I realize it's only a 300 watt light but those plants look pretty tall already.
The smell you can reduce that...by ordering yourself a carbon filter..I'm sure one of these other guys will get on here in a minute and give you a good brand to look for. Cuz I don't know? I don't worry about the smell I'm in a legal state and I grow a lot and don't give two Hoots about what anybody thinks about the smell.
But the main thing I'm worried about is with what I see in your grow room is that you don't have enough ceiling space for the plants you have now. They are already pretty big and tall girls.
I might think that you might want to take clones from those plants and give that a go with some shorter plants.
Study while you're waiting for those clones to grow amd study some manipulation techniques and LST and scrog netting to help keep your height down in that small grow room. Because them plants when you flip them over to 12/12 and turn them into flowering they're going to explode with growth and most likely out growing your ceiling space in that room.