This is why you should be taking self-portraits ...

DZVONKO PETROVSKI, LIGHT STALKING:

"... most beginner photographers don’t have the courage to head out and photograph people at first, so they often practice by using themselves as the model. Acquiring the self-esteem to photograph other people is a totally different subject matter, but while in that process, you should at least make the most out of self-portraits so that you will be better prepared to move on to photographing other people.

"Self-portraits are generally a lot harder than photographing other people, since you are the model and the photographer at the same time. What you will learn with the very first try is that it takes a good deal of planning and trial-and-error to achieve the image you have in mind."

Read more, here.