I've got experience doing this myself. It's not a good experience, but it's experience.
This same thing happened to me a year or so ago. I fixed it myself, but couldn't get the electronic connection back correctly. I ended up sending it to Alpine Camera in Spokane to have a lens guy work on it. In the end, it cost me 2x as much compared to if I had just sent it to them in the first place.
I'm really good at taking things apart. Not so good at putting them back together again.
So, buyer beware if you undertake this yourself. It's do-able, but just know the downside. Mamas, don't let your children make the mistakes I've done.