You are a smart, important, individual human being with likes and dislikes, traits, habits, hobbies, and preferences. So why don't you get to know yourself?
Knowing ourselves is an important part of making our lives what we want to them to be, which is ultimately happy. If we don't know ourselves we can't fill our time with what we know if going to fulfill us and bring us what we want. We first have to know what it is we want. A successful career? Okay, but what does success mean to you exactly? Etc.
"What do you want out of life" is a daunting question and one that we can't really know the answer to unless we first know ourselves and what it is we like and dislike. We can't decide "this is what I am going to do for the rest of my life" without knowing whether or not we actually like doing that thing. Take the time to get to know yourself. Know what you like. Know the kinds of people you can tolerate and the kinds of people you cannot. Remember those things. Get to know you as if you were trying to get to know a friend.
If you feel like you don't know who you are or you struggle with knowing what you want to do with your time I encourage you right now to get a piece of paper and write about yourself. Make a list of activity's you like or find interesting. Make a list of what you like in people and what you don't like. If the lists are short this is a sign that you have some work to do. Make a list of things you still have yet to try and start experimenting. Seek out new kinds of people, research other cultures. Become knowledgeable. Every couple of years you should update these lists because we are all constantly growing and changing. I personally want to go update my lists now after writing this because I think there's some new info I could put on there.
Make it fun. Getting to know yourself should be a treasured goal and constant evolution. Not a set task to be completed. You will never stop learning about yourself. There is always more to learn. There is always more to learn about life in itself.
Keep learning, keeping growing and live a happier life.