Anybody can learn to draw, the key is to lean to observe what you see. If you want to increase your observations skills, try doing some blind contour drawings. Blind contour drawings are done by drawing an object without ever looking at the paper. The final drawing is not important, although you may be surprise at how recognizable the object is when you are done. The most important thing is to carefully observe the object and don't rush, just take your time and don't peek!
I like to draw my hand as it is always available and the possibilities are endless depending on how your hand is positioned. Place your hand in a comfortable position and put your graphite pencil on your paper. If you are not using a drawing book, you may need to tape your paper to your drawing surface so that it does not slide around. I usually start at the bottom of my hand near the wrist and work my way up from there. Just follow the line of your wrist very slowly allowing your pencil to follow every nook and cranny of your hand.
The more detail you can capture the better. The line must be continuous (i.e. don't lift the pencil) but can go back and forth the capture details such as folds of the skin etc. Once you are done, take a look. It is surprising that areas often look complete as though you had been looking at the paper the whole time! Try different objects, plants, flowers, dishes etc. This is also a good way to get loosened up before starting a drawing session. Practice, practice, practice :)