My two cents: Go to a neurosurgeon since the principal area of injury/damage is nerve-centered. You describe "moderate spinal canal narrowing" which suggests there may be many steps to progress through before you reach the point of a surgical correction. I'd suggest following all those steps and defer surgery until either (1) You have reached the end of your rope or (2) You have a definitive diagnosis - from a neurosurgeon - that surgical correction is the clear best choice.

My best...