Open world/arena RPG P.T

Hi all
sorry for my writing, I’m dyslexic so not my strong suit. thanks for understanding.

I’m a beginner when it comes to game development but I’m putting the effort I can to learn UE5, but need help developing the game concept I have.
it wouldn’t be the full game but a playable tease to show what I’m after, any help would be apricated.

the game is a fantasy which would have co-op and PvP. The P.T would be a slice of both to show the arena and the open world co-op aspects and the levels of customization in which you can craft your characters. the setting is a city in the desert which would be a small slice of the hole open would i would like to build one day.

if you are interested or would like to know more feel free to message for a discussion, looking forward to see what you say.