Looking good man, good for you for competing so early! Awesome!
I agree with @The_Mighty_Stu on overall size, also calves calves calves, shoulders and arms. You look like you have a good v-taper, which you want to keep of course. This could be done over time by higher frequency (training shoulders/arms twice a week), and simply trying to get stronger in your upper body.
Tighter means leaner, water retention really isn't involved. Lots of times when people aren't lean enough they call it water retention, when in reality they have a few more pounds to lose. More muscle mass will also make you look much tighter!
My tan melted off my first show! I also did the spray tan the first time. Second time I did the more standard approach of 3-4 base coats of pro-tan, with a top coat of dream tan #2, applied about an hour before pre-judging. That's definitely the way to go, and it's still cheaper than spray tan.
Best of luck, be sure to post any more questions and keep us updated!