If you think you are a true terraria expert and you want to start a hardcore expert mode you need to plan every terraria day and every terraria night, my plans can help you a lot...
First day : Avoid the slimes at all costs ,cut trees and build the house immediately after you start your adventure
First night: Stay in house , craft some wooden gear , build a hellevator
2nd day : Explore the surface , if you are lucky you can find some great stuff, avoid the crimson/corruprion and the jungle , get some cactus
2nd night : Move in a cave , you can discover some great stuff there, be always careful at traps , at 100 HP even a dart trap can end your advenuture.
3rd day : Keep digging the hellevator and explore the treasures there...
3rd night : Fight with some night monsters , prepare the lens and arena for Eye of Cthulhu
4th day : Get some bombs and go to Corruption/Crimson, this sounds a bit crazy but if you are very careful you can reach at orbs/hearts without taking damage making wood walls, if you are lucky you can get the musket/ the undertaker and the arms dealer will move to your house
4th night: Fight night monsters or keep mining the hellevator
5th day : Upgrade your eye of cthulhu arena and sell some stuff at arms dealer until you have enough money for minishark, this will help you a lot against EoC and make some potions, you need Hermes Boots if you want to defeat him, if you have a lucky day and spawn a meteorite go to mine it, the armor+ space gun is very helpful and the rest you can earn a lot of money.
5th night : Eye of Cthulhu Boss Fight!
After defeating the eye of cthulhu you don't need more plans , you can improvise ...
IMPORTANT TIPS:
-Do not waste your LEAD/IRON ores/bars for Iron/Lead Gear and Decorations, they can help you a lot for ironskin potions and Mechanical Boss Item Summoner.
-Never use the copper shortsword for defending, you should use the pickaxe or craft a wooden sword.
I hope i helped you, i am not english so i am sorry for language mistakes.
First day : Avoid the slimes at all costs ,cut trees and build the house immediately after you start your adventure
First night: Stay in house , craft some wooden gear , build a hellevator
2nd day : Explore the surface , if you are lucky you can find some great stuff, avoid the crimson/corruprion and the jungle , get some cactus
2nd night : Move in a cave , you can discover some great stuff there, be always careful at traps , at 100 HP even a dart trap can end your advenuture.
3rd day : Keep digging the hellevator and explore the treasures there...
3rd night : Fight with some night monsters , prepare the lens and arena for Eye of Cthulhu
4th day : Get some bombs and go to Corruption/Crimson, this sounds a bit crazy but if you are very careful you can reach at orbs/hearts without taking damage making wood walls, if you are lucky you can get the musket/ the undertaker and the arms dealer will move to your house
4th night: Fight night monsters or keep mining the hellevator
5th day : Upgrade your eye of cthulhu arena and sell some stuff at arms dealer until you have enough money for minishark, this will help you a lot against EoC and make some potions, you need Hermes Boots if you want to defeat him, if you have a lucky day and spawn a meteorite go to mine it, the armor+ space gun is very helpful and the rest you can earn a lot of money.
5th night : Eye of Cthulhu Boss Fight!
After defeating the eye of cthulhu you don't need more plans , you can improvise ...
IMPORTANT TIPS:
-Do not waste your LEAD/IRON ores/bars for Iron/Lead Gear and Decorations, they can help you a lot for ironskin potions and Mechanical Boss Item Summoner.
-Never use the copper shortsword for defending, you should use the pickaxe or craft a wooden sword.
I hope i helped you, i am not english so i am sorry for language mistakes.