I think you’re underestimating the amount of work creating a game is. Dreaming is fine, the next step is to commit some ideas on paper. A project of this scope is unheard of for a solo developer. So you better have a nice chunk of cash behind you to pay for some developers.

I would strongly suggest you start with a very basic tutorial for Unreal engine and then slowly expand on that to even see if it’s something you’d enjoy doing.

We all dream of our perfect games and maybe scribble down some notes, but actually putting in the work is a whole other matter. What do you have that the tens of thousand survival games made in unreal engine in steam lacks?