You are doing AWESOME!!! Wanna go to the beach when you come???
What are your settings... that could be what is causing it.
It is a great shot. You need more light if you want sharper pictures. Your camera is trying to compensate by slower shutter speed, high ISO. Grab a silver car shade and reflect done extra light on t your subject. Also try adjusting your white balance. The photo looks a tad warm, too. Really great job. You asked for feedback, so I hope you dont take it wrong. :)