The track is secured with these little brackets and they're adjustable. There's a slot that it rides in so you can unscrew it here and adjust it if you need to. And you're going to have to pay attention and look at it closely to make sure it's in the right spot, but it's not that tricky and you can do it. And usually one side is out of alignment so you can compare it to the other and then adjust it as needed.
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4.4 Take the spring on the left and place it at the left end of the door as pictured here. Notice that the end of the wire points to the right toward the center of the door. This is a right wind torsion spring. It will go above the garage door on the left side of the spring anchor bracket. The winding cone at the other end of this spring is usually painted red.