How use backpack but make it invisible?

I need help, I know how to make the backpack invisible, but I don't know how to still be able to use the tools.

local StarterGui = game:GetService('StarterGui')

StarterGui:SetCoreGuiEnabled(Enum.CoreGuiType.Backpack, false)

if you find a working script, what type should it be (local or regular) and where do i put it?

It should already be usable... if you are trying to make a custom backpack, there is a lot of tutorials on that.

This can fully depends on what your making it for and if you want to have multiple tools in the backpack. First things first if you want multiple tools you can just hide the guis. Two simple scripts which can be run via a local script in starterplayerscripts

The code lines are as follows:

--Put this in game.StarterPlayer.StarterPlayerScripts in a local script--
local Core = game:GetService("CoreGui")
local RBLXGui = Core.RobloxGui

RBLXGui.Backpack.Visible = false
RBLXGui.TopBarContainer.Backpack.Visible = false

This will still work and i tested this in studio myself