Not bad for a first time.

It's been said, but get more light on that plant, also, I see your loght is pointed downwards. Turn that light sideways so the light comes from the sides of the bulb, rather than from the tip of the bulb. There is a 25% more light output from the sides, and, having a bulb sideways, the heat doesn't travel upwards as it would like you have it. Heat rises, so if that bulb is downwards, the built in ballast and light itself gets damn fucking hot. On its side though, the heat doesn't travel up the bulb heating it.

Just a suggestion so keep it in mind.

Also, is that plant in a light free area when the light is off. When that light is off, it must be 100% dark in your grow room area, or you will end up with a male plant, or hermie if it's a clone. Keep that in mind as well as a lot of new growers come back in a month or so, wondering why they got a male plant.

It's simple, when the light is off, 100% dark and no light leaks at all.

Good luck.