The problem is that there's no such thing as the 'real' raw image. The raw data has to be interpreted to produce an image. DPP can read the camera settings at the time of shooting and apply those to the raw data to produce an image that is the same as the jpeg that the camera would have produced.
But DPP is the only program that can apply the camera settings, all other raw processors apply a default set of parameters - either those set by the programmers or those set by the user. The default programmer's parameters are normally set to produce an image that has lower contrast, less sharpening, less noise-reduction and lower saturation than your camera-produced jpeg.
This is responsible for one of the more common complaints about LightRoom - that it initially display a contrasty, over-saturated, over-sharpened image (that the complainant really likes) and then it replaces it with a wishy-washy, colourless, blurry image that it just horrible. That's because LR initially displays the embedded jpeg (which the camera produces using the camera settings) then, once it's processed the raw data, using its default parameters, it displays the 'real' image.
It's realtively easy to fix this by creating your own default parameters that will be applied to each image automagically when you import them.
So, there's no real answer to your question. I'd have to recommend using DPP to start with - because it, by default, is the same as shooting jpeg. But play around with a few images - double-click an image and the editing window should open. If the Tool Palette isn't visible press CTRL-T, then just twiddle with everything until you've got a good idea what it all does. Raw processors don't change the raw data, so you can't ruin anything and can always go back to the beginning.
