Help!! I don't know how to play tracks in a certain order..

I have 3 different parts of a song I’m recording on 3 tracks recorded at different times. I’m new at this, and this may be a crazy question… but I have no idea how to play them in the order I want to! Can anyone please help me

Just use the Time Shift tool to slide the tracks along the timeline to the required position - the tool has the icon which is a small horizontal arrow with arrowheads at both ends - and don’t forghet to revert to the normal cursor once you have finished with the time-shift tool.