Been there done that. In a way I wish I hadn't done it (chicken at the last minute), but it's done. That was 2016 and no real problems since, but I do get headaches (I was prone to them anyway). They are more from neck strain than anything else and they aren't as severe as before.
I had a piched nerve from C6. I'd already had some issues there and every so often my neck would "go out" for a week or so. Pinched nerve came on with just a head turn. Point is that I needed to get it done as it was just going to get worse. Numbness in left arm, fingers numb, and other not so fun stuff.
Take it easy after surgery as you'll probably feel better than you have in a while. Be careful about the discs above and below the surgery as they'll have to take more strain now, but it is just the way it is. A BIG agreement on having a Neurosurgeon do the surgery. Mine was awesome and had done this type of surgery many many times.
As to shooting, you should be fine as long as you aren't shooting heavy recoiling rifles. I do have some issue getting behind the rifle prone for long strings and pay for it afterwards. As I always did prefer to shoot benchrest it's not a huge deal, but my job still requires some prone. I call it the new normal...