Hi Armand,
Well you picked the two hardest subjects in modern photography there to have a go at in one fell swoop, trying to get a good well composed image of the Grand Canyon is about as hard as it gets - a lot try and very few succeed. Then if that is not enough, learning how to use PS at the same time. I have been using PS in most of its versions since the late nineties (OMG is it that long
) and I am still learning. A good place to start is something like youtube for basic ideas and local classes if you can find something, oh and a patient but knowledgeable friend is helpful, and so is a good but basic PS user guide or DVD guide, there are quite a few of them on ebay and then all you need to do is apply the 10,000 hour rule, and by which time you should start to get the basics.
Then there is the Grand Canyon (I assume that is what the image is of BTW), I tried it once before with no success, then I went back when I thought I was a lot smarter and a lot more savvy photographer, and over a two week period I drove all the way down one side and back up the other, but alas still with nothing I could use, Alain Briot is your man, he seems to get the better of it, so perhaps one or two of his books might also help, here is a link to Alain's site and images on the Grand canyon
http://www.beautiful-landscape.com/Gd%20Cyn%20Portfolio%20Body.html he also contributes to LuLa, so you might already know his work.
Good luck
Dave