With all this talk of DoF, composition, and ideal lighting, let me offer one more thing.
First a story. in the early 2000 I was working for Nokia, and we were discussing the merits of having a camera on a mobile phone. As the time, the sensors were VGA resolution, (640x480 or 0.3MP), and there was no way to get the images off the device wirelessly.
We had a meeting in a big conference room at HQ in Espoo Finland, trying to decide the matter. Many photographic experts were contracted in to add insight. Most were against the idea, as the quality sucked. It seemed that was the way the deal was going to go, until a philosopher (you read that right) who was brought in for just the occasion chimed in. He said, 'You can't think of it as a CAMERA. You have to think of it as a MEMORY SAVER. The whole room went silent. We voted almost unanimously for cameras.
From that day I try and take a least one picture a day. Well over 20,000 images stored to the device and cloud. Memories. I look back at them, and many are poorly composed etc, but are memories that need to be saved. So snap away. one a day. Forget everything you think you know about 'good' photography. You'll thank me in 20 years.