I'm with David (sorry Angela <g>) as the horizon is a bit too central for me. I'd lose a bit off the bottom to drop the horizon a bit lower and accentuate the detail in the cumulus sky. I think the picture has plenty of depth anyway with the clouds and the distant horizon so cropping a bit (not all) of the shingle area (that's why I hate going to Brighton/Worthing beach.... no sand, but does make good pictures

) The lighting does need adjusting slightly, it's a bit flat and dark but that is easily changed.
Good first show there, well done.
Cheers,
Rob