It's an easy job. You'll need:
Tack puller - and if the tacks are damaged as you pull them, you can buy fresh tacks at Home Depot, or Lowes, one of those.
Tack hammer
Fresh head
Remove the tacks and the old head. Soak the new skin for about 10 minutes in warm water. The head will be soft and stretchy. Tack one side, then pull it from the other/opposite side and tack. Repeat going around the tambourine always tacking opposite sides, like tuning a drum. Once all the tacks are back in allow the head to dry thoroughly. It will tighten up as it dries and go up in pitch until it is dry and stable. After it's dried, trim the excess and you're good to go for another 100,000 miles. Two hour job from start to finish. You can do it.
John