Unlike in vanilla Minecraft, you will not die when you jump into the void. Therefore, your goal at the start is to simply fall off the bedrock block, and into The End. From here, your goal is simple: kill the Ender Dragon. The crystals can be destroyed with ender pearls to reduce their knockback and damage. Once you've done that, your next goal is to get a pickaxe from an end city.
  Your next step after acquiring a pickaxe is to mine any blocks you can, and expand the overworld. Preferably, you will want to expand North so you can reach the Dark Void biome quickest. The Dark Void biome is special for many reasons, but currently, it's primary benefit will be the Illusioner mob that spawns in it. The Illusioner drops Amethyst Shards, which can be used as a currency for the Wandering Trader.
  The Wandering Trader offers a few things, but only one is crucial for your progression. To get further, you will need to buy Moss Blocks from the Wandering Trader, which are sold at a rate of 4 Amethyst Shards for 2 Moss Blocks. You can use bone meal on the moss blocks to get Azaleas, which can then have more bone meal applied to them to grow into trees. This will give you an endless source of wood.
  After getting wood, your goal is to go to The Nether. Obsidian for its frame can be obtained from the pillars in The End. However, there is a slight issue in the form of lighting the portal. Usually, you can do it with a flint and steel, but now you'll have to do it with a lightning bolt. Drowned drop copper ingots, which can be crafted into a lightning rod that directs any nearby lightning towards itself. Drowned can spawn in either waters of the Raptured Void, or from a drowned Zombie. Water can be obtained during rain in a cauldron.
  After you've reached The Nether, your one last goal is to get lava. After this point, you can make a cobblestone generator, and the progression of your playthrough becomes purely based on your own goals. Several advancements exist to aid in providing goals for this later-game progression.