Hello, i need help on making a 2d game-boy style game, but am new to game development and don't know how. Can somebody tell me how to make a 2d gameboy-like game?

(what i mean by this, is i need to make a "screen" that can display objects on it, and make it so the character can only move inside the screen.

Maybe GBStudio is the tool you are looking for https://www.gbstudio.dev/.

And here is a nice tutorial on how to get started