Tips for the 3D role-playing simulator game

Hello all
Role-playing simulation games have become popular recently,
and I played some of them, I liked that most of them were created by one or two people.
:100:So, can you give me some advice for playing a role-playing simulator game?
Here are some examples
1/ Hotel waiter
2/ Supermarket
3/ Book store β€œβ€β€œβ€β€œβ€β€œβ€
Tips for someone who doesn’t know anything about programming, so using AI to build the game and some tips for using it is also great