Life is full of paradoxes. When young you have lots of time and not much money. At some point, that will switch and the opposite will be true. During that transition, your mentality will need to switch with it.
When young, say yes to everything to be successful. Then say no to almost everything to be successful.
Finding the right side of the paradox is the secret no one can tell you. It must come with hunger, experience, self-esteem and humility. Often paradoxes themselves. That is the beauty of this big game we are all playing. Enjoy it while you figure it out. It is the only way.