Hello everyone. I wanted to let everyone know that from now on when anyone posts to the "Post Here If You Need Help" thread, I will not be participating. Reason why is, well, I'm a really kind and empathetic and compassionate person, and when someone has a major life problem I can't realistically do anything to help like mental problems and depression that no medication or therapy seems to be able to make better, abusive family situations, being extremely poor and not able to pay for medical services or other things they need, etc., it makes me feel bad, even though you probably would say I shouldn't because there's nothing I can realistically do about it. So since I don't want to feel the guilt of that, I won't be participating in that thread anymore. I'm glad I helped KerriganKoopa, though, and the fact I helped one person in that thread makes me feel a little bit better.
As for the fight itself, it depends on how comfortable you are with the controls and game jank. You should definitely have a bow and enough arrows because you'll need to hit some remote targets in the air. Diamond armor would be helpful too, and some healing options are a good idea as well. Optionally you could bring some empty bottles if you want to collect dragon breath clouds that'll be left on the ground during the fight.
Beyond that the dragon isn't really a big deal. You definitely have to go way out of your way to enter this fight, so if you don't want to do it, you can just keep playing the game normally. This isn't something you can stumble into accidentally.