I agree you sure jumped in with both feet buying a .460 Bee!
As far as a scoped rifle on safari no problem, and a lot of guys shoot the big 5 at close range with a scope. Most are running something like a VX3 1.5-5X20 or similar. Here is a good article on
Dangerous Game Optics and will give you an idea on what type of scope will work on a brute like you have.
I hope you learn to shoot that rifle well. I just can't imagine touching off heavy loads in a rifle like that. About all the recoil I like to handle is what my little .375 Ruger will produce.