Experimentation is a great way to learn, but how do you choose what to learn?
Talk to scientists about what makes a good experiment, and they'll say a good hypothesis. Ask them what makes a good hypothesis, and they'll probably come to observation. A hypothesis based on actual observation is called a grounded hypothesis.
A lot of us have sat around, waiting for our Eureka moment like Isaac Newton. But he wasn't waiting around in his lab, he was out observing the real world. He was under a tree, which is why he was in a position for the apple to fall on him. The theory of gravity literally hit him on the head!
Observe with an open mind. Let reality hit you. Then you'll have solid, grounded, hypotheses -- the ones worth testing.