I'm 15, have never lifted before, but I want to start now. Need help.

SO like I said, I am 15, 5'11", and I weigh about 160lbs. I have pretty much no muscle. I want to lose some fatty weight (not much, but maybe 10 pounds) and also put on muscle. I obviously know this isn't really possible to say I want to lose and gain weight, but I cannot explain it another way. I know pretty much nothing about lifting or making a schedule/program for myself. I have a gym at my school I can use and it seems like its got enough equipment to suffice for what I need. Once again I would like any help you have to offer. Thanks for reading and any help given. Also If I am going about things wrong let me know.