Hi Kim,
If I open this image full size in my editing software it is pretty darn good ! I would be pleased to take this scene and produce an image of equivalent quality.
A percieved lack of sharpness
could possibly be due to a number of things, some already covered here but in my opinion it
could very easily be increased
if wanted by what would be considered as
very basic routine sharpening/enhancement technique.
What I will say is that the images you are posting are of high quality (disregarding such things as composition/brightness which are subjective) and suggest taken by someone with greater experience than what you suggest to us.
My advice, carry on learning from the excellent advice given in this thread
Grahame