No prob! :)
I'd normally suggest installing it on a separate empty drive to test it out, but I know it can be a real bear to access those to swap em out on a laptop.
In your case though, I think as long as you can get a Live version of Mint to boot successfully from a USB stick (like there's no flickering issues at the desktop and everything renders correctly), that's usually a pretty good sign everything will be fine after you install the Nvidia driver on a full install (not to say you 100% won't encounter any issues, it's still possible, but hopefully not!)