Terraria played through - what next?

I "played through" Terraria on the PS4, i.e. Defeated the Moonlord. I've beaten him several times to get his drops, with other bosses too. I think the game is very cool and would like to continue playing, but unfortunately I don't know what else to do. In addition, I can't play online, otherwise this question would not have arisen. Does anyone have any ideas? 😂

Hmm create a new character with Challenge (for yourself). For example, playing through the game without dying once or maybe only with melee weapons. You have endless ideas. Or, of course, get a new game.

Continue playing in Master or Expert mode… (adjustable when generating the world)

Play a new character in medium core or hardcore (can be set in the character settings), only select a certain weapon class… Ect…