You aren’t just suddenly going to be able to answer a question like this. It’s too dependent on your experiences and development. I suspect that the meaning of life is actually the living of life.
Therefore, you have to give yourself the opportunity to live before you can begin to come up with some sort of personal philosophy that might answer that question. Let me be clear, however. I do not mean that you should try to do every crazy thing that pops into your mind. People use the idea of personal “discovery” as an excuse to do things that are obviously harmful to themselves and others.
Personally, I do not believe this question can be answered without having God in your life. Exactly how one goes about living with God as central to his/her life is open to question, but I don’t think it’s possible to have a meaningful life without him.
So, and this probably isn’t the answer you’re looking for, but you have to live life the best way you can, and look above for gradual answers. I don’t believe that we are imbued with the knowledge of the meaning of life all at once.