What Can Be Learned From Pinhole Photography?

The image above is a pinhole photograph taken using color paper. From pinhole photography, an unexprienced photographer like me can learn a lot about the art in a more simplistic way. A way that gives more insight than from using the standard digital camera I use now.I can learn about wide angles, focal lengths and exposure times. All of these I do not know about yet but will be able to see in a step-by-step process with a pinhole camera. It is also a new kind of art and maybe a new hobby