Unsure about my major.?

Okay i am 15 and thinking about my major. is it okay to have different ones? So far i want to be a poet/writer(write for seventeen)So that's a writer correct. okay. Second, i want to help teen girls and talk to them give them advice so what would that be ??A physiologist ,counselor or advocate??im confused. Lastly, i am funny so i want to do something that deals with being funny but i don't really want to be a comedian. So,help me! Please thanks. jess.