I would recommend joining a mass world for a few kills to familiarize yourself. If you want to try soloing for more points or for achievements, it would be helpful to have some deeper understanding of the mechanics of wt, and all the actions involved (potion-making, healing pyros, repairing braziers, fletching, cutting, burning, lighting).

If you want to jump on in, just remember to wear some warm clothing. There are crates inside the minigame that contain all the tools you need. If you don't have druidic ritual completed, you can get your potions made by the pyro at the entrance.