Hey, so I have an idea for a game and it is my first time to create one. I wanna know what application I'm gonna use to create indoor gameplay
It depends on the game making software
BUT FIRST START WITH LAYOUT AND MAKE
A NEW ROOM THEN EDIT THE ROOM
WITH ANY BACKGROUND YOU WANT SEE
I would recommend the Godot engine, as it is great for beginners and has solid 2d and 3d modes with pretty good lighting and graphics for each. (It's also the one I use so I'm a little biased)