Selecting only one track to move or manipulate

How do you select just one track and not all the tracks? Can I just drag and drop like on any other program or is it much more complicated than that? Why are all tracks being affected when I try to move one track this is killing me?

If the tracks are “selected” (highlighted in a darker colour), then the tracks will move together. If they are not selected, then, by default, only the track that you are dragging will move, unless you have accidentally enabled “Sync-Lock”