There is a lot to be said for learning photography in the digital age and one of the great advantages is that it costs nothing to take a bunch of extra shots.
In the days of film you would have been restricted in your output based upon your budget.
Film and processing costs quite literally forced photographers to get good fast, go broke or give up.
These days its a different story. Shooting a multitude of extra shots may very well get you the shot exactly how you want it but doing it mindlessly will teach you nothing.
So by all means take advantage of the freedom offered by digital photography but at the same time note what you are doing and note the different outcomes you are achieving as you do them to improve your skills.