Hi ! I haven't had that particular surgery, but since you have compression of the spiinal cord, it's obvious something needs to be done! And I guess the surgery you're having is about the only thing that CAN be done, although I'm afraid of fusions as the levels above and below the fusion sites tend to fail, leaving you with probable problems later on. It's called the "domino" effect, and usually the doctors don't tell you that.
But you do what you have to do.
You'd better figure on longer healiing times than what they've said. I do NOT see you going back to work in 8 weeks after THAT kind of surgery!
I had 2 open laminectomy/disectomies/foramenotomies and it was 4 months before I could go back PART TIME and 6 months before I could go back full time!! And I didn't have fusion!!! It was the same for each surgery. So plan on a bit longer. You'll need some help when you first get home. The first week is going to be rough. Perhaps your Mom or a neighbor could come in and help. Have some meals cooked ahead of time and freeze them so all you have to do is defrost them and put them in the oven for your family.
Make sure all the laundry is done before surgery too so no one is holllering for clean clothes. LOL Have the grocery shopping done too.
Hopefully others will come in and add to the list of things to do ahead of time, and also add to what you should know about the surgery. God bless and best of luck! Hugs, Lee