I am using both Photoshop CS& and Photoshop CC. Though I prefer CC as its newer and better in may ways, but my school PC only has CS6 and that is more than fine for the kind of work I normally do.
The Best program to use is photoshop...i mean come one you can do some good GFXing in that...But when you first start it will be confusing but you will learn right...lol look where i am taking request and people are liking my work...so just give PS a try to me nothing is impossiable.