How does Camera Manipulation work?

So in my game, I need to use Camera Manipulation. The only problem is that I'm new to Camera Manipulation and my script doesn't seem to be working right. This is my script:

local Camera = game.Workspace.CurrentCamera
local Mouse = game.Players.LocalPlayer:GetMouse()
local Players = game:GetService('Players')
InInventory = false





Mouse.KeyDown:Connect(function(key)
	
	if key:lower() == "e" or key:upper() == "E" then
		
		if InInventory == false then
			
			Camera.CameraType = Enum.CameraType.Scriptable
			
			InInventory = true
			
		end
		
	end
	
end)


Mouse.KeyDown:Connect(function(key)
	
	if key:lower() == "e" or key:upper() == "E" then
			
		if InInventory == true then
			
			Camera.CameraType = Enum.CameraType.Fixed
			
			Camera.CameraSubject = Players.LocalPlayer.Character:FindFirstChildOfClass("Humanoid")
			
			wait(2.5)
			
			InInventory = false
			
		end
		
	end
	
end)

I made an inventory system. I want to use Camera Manipulation to make the player not able to move the Camera while in the inventory.

Anyone know how to do this, if so, please help.

Never mind, I fixed it.