How tO make hair look less greasy and more full?

My hair is really greasy when i wake up and it sucks. Im a guy and im 15 what should i do to my hair? Its dark brown and about 3-4 inches long. Usually by the end of the day my hair is going everywere and it looks greasy. It also never looks full i jus want sme nice hair for the ladies give me sme tips plz