I'll jump in with some constructive critism, since that's what you asked for.
Good pic... get CLOSER... and then get closer still. Your strobe might have been a little off... seems to be lighting the right side more than the left. A model light helps at night or in murky conditions... Ikelite makes a gizmo to attach a small dive light to the strobe, or you can rig one yourself. During the day you'll just have to experiment with strobe placement. Find something that won't move on you and take some shots with different strobe positioning... go to the extremes moving it so you get a better idea of how to aim it to create the lighting that you want. Sometimes on macro shots, I have the strobe pointing across the subject instead of directly lighting it... sometimes I'm too close to have the strobe pointing at my subject, and have the arms folded so the strobe is in on the side of the housing pointing across the lens. The 'film' and 'developing' are free with your camera... just get out and shoot a ton of pics.
