Make a Wooden Sword & Wooden Armor. Once you have that, head to the Corruption/Crimson, and cut down as many trees as you can. Use your new Ebonwood/Shadewood to make better armor/sword. Go mining. You can skip making pickaxes, your starter one can serve you well enough. Be sure to keep building houses for NPCs, the entire time! Key items you need; Silver/Tungsten Ore (enough to make a sword, armor, and bow), Gemstones (magic staves), Magic Mirror (chests), Hermes' Boots (chests) Once you have at least the armor (and preferably the boots) you should be good to head to the Jungle. Once there, look for Pirhanas. Kill them until you get a hook. Use iron/lead + hook to make a grappling hook. Once you have a grappling hook, start going out at night. Fight zombies & demon eyes until you decide your playstyle. (Melee, ranged, or magic) If magic, search for Fallen Stars at night, and build the best Gem Staff you can. (Ruby, or Diamond) If melee or ranged, upgrade your silver/tungsten bow/sword to a gold/platinum. Magic; Try to find diamonds, and spider webs, to make a diamond cloak. Ranged; Gold/platinum armor + a gold/platinum bow is the best you can do, right now. Craft jester arrows from stars. Melee; dive into the ice biome and look for ice chests until you find a sword. Or (PC ONLY) you can try searching for an enchanted sword. (found underground, I think) By this time you should have plenty of lenses. Use these at a Demon/Crimson Alter to make Suspicious Looking Eyes. Use them at night to summon the first boss. Melee & Ranged characters can use the ore dropped to make better swords/bow. You then must delve into the corruption/crimson to break crimson hearts/shadow orbs. This will give loot & spawn the boss.