How can I make a modified version of the ShiftLock Camera?

Hello there,

I'm making a 3rd person platformer/shooter, and have been tearing my hair out over the camera. You see, I want a version of ShiftLock that doesn't focus the camera so low, since I still need to aim. I tried many different scripts I have dug up but cant seem to make heads or tails of any of them, or how to modify them correctly-- whenever they weren't broken. Any help is greatly appreciated with this topic, and I wanted to thank you for your patience, as this seems like such a question asked ad-nauseum.

I've tried this script here, but cant seem to move my camera along the Y-Axis. I also wanted to know if there was a way to enable and disable this modified camera upon the equipment of a tool, as well as fix the issue of the camera clipping through the environment

userInputService = game:GetService("UserInputService")
contextActionService = game:GetService("ContextActionService")
runService = game:GetService("RunService")
player = game:GetService("Players").LocalPlayer
camera = game.Workspace.CurrentCamera

userInputService.MouseBehavior = Enum.MouseBehavior.LockCenter --Lock mouse to center

x, y = 0, 0;
function getMouse(name, state, inputObject)
    x = x + (-inputObject.Delta.x/250)
    y = y + (-inputObject.Delta.y/250)
    if y > 5 then --Top camera angle limit
        y = -5 --Change this as well
    elseif y < -5 then --Bottom camera angle limit
        y = -5 --Change this as well
    end
end
contextActionService:BindActionToInputTypes("MouseMove",getMouse,false,Enum.UserInputType.MouseMovement)

function camUpdate(hrp)
    hrp.CFrame = CFrame.new(hrp.Position) * CFrame.Angles(0,x,0);
end

runService.RenderStepped:connect(function()
    local character = player.Character
    local hrp = character:FindFirstChild("HumanoidRootPart")
    if hrp then
        camUpdate(hrp)
        camera.Focus = hrp.CFrame *  CFrame.new(3,1,0)
        camera.CFrame = hrp.CFrame *  CFrame.new(3,1,12) 
    end
end)