Good job for your first attempt. My first attempt at shooting fireworks did not work at all. I do like the tree shape of the fireworks and how they fill a lot of the frame.
Just a suggestion: next time try decreasing your shutter speed so you capture more light from the fireworks. Also, try not to shoot with a tree right behind the fireworks; it's a little distracting (if you look closely).
Besides those suggestions (which are only my opinions), I think you did a great job.