DPP is indeed good to learn on and fine for eg flowers and well-lit landscapes, but I would say NOT ideal, for portraits. As I said in previous post, you usually need the eyes more sharp and bright than the rest, and ability to fine-tune skin tones. For that you MUST have an editing programme that allows work on a selection from the image only. Have a look at
http://www.photoshopsupport.com/tuto...harpening.html
It isn't lesson 1, but it shows the process a professional goes through to get the results you observed in the borrowed picture next to yours.
Make sure you have latest version of DPP (3.4?) by following links from your camera on Canon site. Make absolutely sure you keep your original; if working on Canon .CR2 you will find DPP does this for you with option to revert to original or last saved at any time. I used to use it when I had a Canon 350D (Xs?) and it won't convert on mac OS10.5, so I now convert old .CR2 using Photoshop elements with all settings neutral> open> save as .tif then proceed as normal. I use Nikon Capture NX2, but you will get far more advice staying with PSE.