What's A Good Photo Shop Software For a Novice-Hope-To-Turn-Pro?

I'm good & ready to purchase some photo image software but really do not know which one would be best for me. What I want do be capable of doing is edit my images by removing backgrounds, sharpen blurry photos, basically turn lousy photos into professional looking ones. I know there has got to be someone out there that knows exactly where I'm at....Your answers will be very much appreciated & thanx in advance!!!