Please need major help in basketball?!!?

So my mom put me on this basketball thing. im having alot of fun but im dissapointed that im the only grl which doesnt bother me very much. Im doing ok in defense but when it comes to ofense the guys never through me the ball and i no i can make it. Im trying to be more awake but i end up embarsing myself with the ball thrown in my face or something. any suggestion?? season almost over and i wana make at least one point. how can i tell them im open without screaming at them. how can i just wake my self up before the game?and i do get nervous which i deff. need help with:)