My fps framework aiming not working any way of fixing? (im not that good at scripting. Read desc)

Ok so i tried making aiming for my fps framework game. But the aiming only works if i use auto clicker at left click then i hold right click and it works. But when i don't use auto clicker it just aims for a millisecond. (i watched yt tutorials btw) Script:

local Player = game.Players.LocalPlayer
local camera = workspace.CurrentCamera
local VM = script.Arms:Clone()
local run = game:GetService("RunService")
local Aiming = false
local Ammo = script.Ammo
local shooting = false
local TS = game:GetService("TweenService")



run.RenderStepped:Connect(function()
    VM.Parent = camera
    VM:SetPrimaryPartCFrame(VM:GetPrimaryPartCFrame():Lerp(camera.CFrame * CFrame.new(0,-1,0),0.5))
    end)
local UIS = game:GetService("UserInputService")
local mouse = Player:GetMouse()
UIS.InputBegan:Connect(function(key, proccessed)
    if key.UserInputType == Enum.UserInputType.MouseButton1 and not proccessed then
        game.Lighting.RemoteEvent:FireServer(mouse.Hit.Position)

    end
end)


UIS.InputBegan:Connect(function(i, p)
        if i.UserInputType == Enum.UserInputType.MouseButton2 and not p then
            Aiming = true
    end
    end)



    UIS.InputEnded:Connect(function(i, p)
        if i.UserInputType == Enum.UserInputType.MouseButton2 and not p then
                Aiming = false
    end



        if Aiming == true then
            VM:SetPrimaryPartCFrame(VM:GetPrimaryPartCFrame():Lerp(camera.CFrame * CFrame.new(-4,-1,0),0.5))
        elseif Aiming == false then
        VM:SetPrimaryPartCFrame(VM:GetPrimaryPartCFrame():Lerp(camera.CFrame * CFrame.new(0,-1,0),0.5))
end
end)