Your first grow is all about trial and error. That's how you learn what works and what doesn't and it'll give you a better idea on how to up your yields for your next grow. It's all about learning as you go, so try not to be discouraged by people. The best advice I can give you is read, read, read. And when you think you've got a pretty good idea, read some more. This is a plethora of information on this site for you to look through.
But what I would recommend is adding more lights, and keeping the light coverage as even as possible, with the lights about 2-3 inches away from the plant.
Good luck man!