how to use a key to change something in an enviroment?

I'm making a small singleplayer minigame and my lack of knowledge of any coding language has left me unable to make a script that binds the q key to replace a button can anyone help me with this?

So if I get this, you want to bind something to Q key, right? Put a local script to StarterCharacterScripts Put this code into it: (This is an example)

function onKeyPress(inputObject, gameProcessedEvent)
	if inputObject.KeyCode == Enum.KeyCode.Q then -- if key is Q
		--Q was pressed, do stuff
	end
end
 
game:GetService("UserInputService").InputBegan:Connect(onKeyPress) -- on input began (see the link what I sent) - connect onKeyPress() function

You can read about UserInputService's InputBegan event there