You can just use adobe camera raw to do basic workflow of RAW images. I hardly ever use Photoshop as I don't tend to do pixel editing. It you just want to make global adjustments to exposure, colour, white balance, contrast, saturation, cropping, highlight recovery etc. then Apple Aperture or Adobe Lightroom are excellent programs, especially if you take a lot of pictures because they help you manage and block adjust batches of photos.
Both of those are available to download as a free trial (Aperture is Mac only) so you can try them out.