Hi Jeanette, I just had a look at your gallery. I particularly like the first one you posted, of the Retzer Nature Centre, and also the Snail Shell Harbor (I like it as it is). The waterfalls are great too - you have loads of choice. You have to go for it - you know in your heart the one that means most to YOU.
I had an exhibition last year of ten prints. It was very scary, - but when the picture is actually up, it will be great, believe me.
BTW that thing about spots of dust under the glass resonates - but at the same time don't drive yourself mad with it; learn also to call it a day; be proud of what you've done..