Hi nichehole,
Congratulations on your new mattress 
You certainly made a great quality/value choice and I’m looking forward to finding out how you like it once you’ve received it and have had the chance to sleep on it for a bit.
There is more about the pros and cons of different types of mattress protectors and some examples of each of them in post #89 here that should be helpful. The most common choice would probably be one of the “thin membrane” types of protectors because they are mostly waterproof and have little effect on the feel and contouring of the mattress.
Phoenix