I am 15 and going on a flight by myself. ive never been in an airport before, and i have a layover. HELP!?

the layover is an hour and a half, and i am okay with being in a airport for that long, and people dont make me uncomfortable, but im worried that i wont know where to go, and how to get there. will there be signs or people telling me where to go? and what do i do about my baggage? im only bringing one bag, and a carry on. how do i find/go where i need to be?