In my experience I've seen marked improvement in coordination after pilots get a little tailwheel time. So it isnt necessary by any means, but it absolutely makes one a better pilot, same as getting the high performance and complex endorsements. Regardless, it's just fun.
OP, first go find a flight school and take a "discovery flight". Usually 45-60 minutes and should run 75-100 bucks. You'll know immediately after if it's something you find worth investing a ton of cash and time into. If so, before you sink any money into flight time, get your 3rd class medical. The flight school guys will explain what that is and let you know who can do it in your area.