Wad's is life.?

Life to me jus like a game no matter how much you have put in or score something in your life you have to come to the end. Like wise i have so much of dream and aim to score but i don't know where to start from just very confused. I need to real start my career i'm 21 now not young and old just in the middle i must now start thinking of my future or else i will sure lost my way. I need someone to pull me along i really want to strike my career to the max.