you can collect all blaze rods before wandering to the nearby Piglin biome for trading. You can also get most of your basic resources from chests in the three fortresses. Finally, you just have to return to the Overworld, locate a stronghold, and kill the dragon....
you might come across a Spider spawner or a mob spawner in these tunnels. These spawners can be quite hard to deal with, but once you get the idea, you can build impressiveMob farmsusing them.