Hello Gerardo,
When it comes to photography and editing of your photos, you are likely to come across two general opinions.
For some photographers, the act of taking a photo is the most important and setting everything up right prior to taking it is crucial to achieve satisfactory results. These photographers aim to capture what they see with their own eyes, trying to keep is as real as possible.
There is another group of photographers, for whom the act of capturing a photo is just the beginning. They believe that the final result is not what they see, but rather what they imagine while taking a snap, therefore they use programs such as Photoshop to make their photos look exactly as they have imagined them.
While the first group will use graphic software for minor adjustments of the image and colour calibration, the latter group can alter images to the extent that they hardly resemble the original photos. As much as you can easily survive without any editing knowledge, you can miss out on the possibilities the graphic programs have on offer.
My suggestion is give it a go, it’s not difficult and with time you will learn how to make your images look great. Start with basic colour management techniques, which always come in handy. There are thousands of great Photoshop tutorials on the net, spend 30 minutes a day and you will be a pro in no time

However, never forget to take good photos in the first place, as editing can’t fix everything!
Good luck!