No worry John, they're good shots, they show something different to what people see when they stroll around and thats good. you've got an eye for a shot, that's the hard bit. now you just need to do the easy (but long) part, practice, and learn as much as you can about ur gear and shots. Learning will give you more options and help open your eyes to some the possibilitiles that a shot could form.
Keep posting! Welcome to the team
If you don't take multiple exposures but your shooting raw you can open the file, increase or decrease the exposure, re save it as e.g. file0001_LOW or file0001_High.You can merge these multiples later. This will only work well if what you're trying to capture isn't to far off your shot i.e. way to dark, way to bright.
zenNon, I was explaining bracketing. Where've you been hiding anyway?