When you make a post, you'll see 'Add Images' above where you type. Upload a photo to your area then provide the link to the photo in your post (paste the link) then we can take a look and give you some tips. For removing dust spots, the easiest way (personally) is to clone them out. Even easier than that, make sure your sensor is clean before you use the camera then you'll not have to spend hours cloning the same dust spot(s) from every image!
Equipment: 2x Canon EOS 50D; Sigma 10-20 EX DC HSM, 50-500 EX APO DG, Canon 24-105 f/4 L, Speedlite 430EX