Don't assume that anyone older than you knows what they are doing. No one has all the answers and everyone is exploring their own path. It's easy to spend one's life in complete unconsciousness, going with the flow and the crowd. As we embark on life's journey, it's easy to succumb to societal pressures to chase money, beauty, power, or intelligence. However, I assure you that if you chase money, you will always feel poor; if you honor beauty and appearance, you will always feel ugly; if you worship power, you will always feel weak. You will never be satisfied. So the toughest choice you will face as you grow into an adult is to choose what you value, what you focus on, what you care about. You have to choose how you live your life. When we make these choices, we shape the story of our lives.
There's also the fact that life is very forgiving, so the cost of our trial and error isn't very high. But the cost of missing out is high, be brave!