If the drain hole is standard everything should be fine but check the disposal manufacturer's website and the dimensions guide for the new sink. I would want brand new components in my new sink, like collar that surrounds the drain. Also check with the plumber doing the installation.

It's pretty straightforward. Pay attention as to how it comes apart and you should be fine. Newbies have difficulty snapping the retainer ring back on while simultaneously keeping the flange from popping up. You may want a second set of hands to hold the flange in place while you install the ring.

I'd use 100% silicone on the flange after cleaning it throughly please. Plumber's putty leaks; the eco-weenies have apparently taken out the chemicals that used to keep it soft and leak-free years ago.

And do it during the daytime so you can run to the store if you find something looks too trashy to reuse. :)

Disposals tend to not make it through the transplant process unless they are the new higher quality Evolution series. The old Badger ones rust out, and when you move them, holes instantly develop, and they leak.

This disposal is only about a year old so it’s worth keeping. I have no problems installing sinks and faucets, just not familiar with disposals. Hoping everything is readily available should I need to replace something along the way.

There aren't going to be any failed parts in a year-old disposal. We switch hundreds of these a year; no callbacks.

Anything I need to purchase ahead of time besides a new flange?

Polish the flange; 5 minutes.