I want to be entertained tonight so I'm signing up for the free trial. Two questions!
a) any particular events I should watch to be "ready" for WrestleMania?
b) what are some of the best things to watch from 2000-current? Pretty much stopped watching 1998ish.
Welcome friend. I recommend watching all of the 2016 PPVs (Royal Rumble, Fastlane, Roadblock) to be caught up for Wrestlemania.
If you stopped watching Raw around 1998, you might be able to pick up where you left off and go from there.
Also, I recommend checking out WWE NXT. It's the standout product of the WWE Network.