Most of the stuff in your WH is probably too dated to use. Sell what you can to NPC. (Not much can be sold there, unfortunately.)
If you started a new character you can do lowbie quests that give you more current Twilight equipment and an Apocalypse weapon for your class. It doesn't hurt to see if your old character is eligible to do the same quest. Go to Gludio and talk to Tarti. If she lets you do the quest, great. If not, you have to decide if you want to keep playing the old character.
If you left the game with a billion adena on your character, just go buy the equipment you need. But if you didn't, you either have to hop on the treadmill of purchasing Ncoins to buy L2 Store items to sell to other players, or hope that you find a really good clan who will help you at least get R grade equipment.
Adena drops are ridiculously low and NCSoft keeps finding ways to further nerf what few places there are that do drop half decent amounts.
Equipment mats and full drops are nonexistent.
There really is no point in spoiling, because crafting requires Ether, which is slow to acquire and untradeable, and it takes tons of it to craft anything.
Don't mean to be the voice of doom and gloom, but 6 years ago was the Golden Era of L2. This is the Dark Age now. Winter has come.