inside BillBoard gui not showing up using Instance.new? (I FOUND OUT SOLUTION)

I made a Custom Name to have and put it inside of the Player this is the script

player = game.Players.LocalPlayer
ChangedName = script.Parent.Parent.ChangeName
button = script.Parent

button.MouseButton1Click:connect(function()
    if player.Character.Head:FindFirstChild("BillboardGui") == nil then -- If there's no GUI
    local Model = Instance.new("BillboardGui", player.Character.Head)
    wait(0.5)
    local Text = Instance.new("TextLabel",Model)
    wait(0.5)
    Model.AlwaysOnTop = true
    Model.StudsOffset = Vector3.new(0,3,0)
    Text.BackgroundTransparency = 1
    Text.Font = "SourceSansBold"
    Text.FontSize = "Size24"
    Text.TextScaled = true
    Text.TextWrapped = false
    Text.TextColor3 = Color3.new(0,0,0)
    Text.TextStrokeColor3 = Color3.new(255/255,255/255,255/255)
    Text.Text = ChangedName.Text
    Text.TextStrokeTransparency = 0

    elseif player.Character.Head:FindFirstChild("BillboardGui") ~= nil then -- Already has the GUI
        wait(0.5)
        local gui = player.Character.Head:FindFirstChild("BillboardGui")
        gui.TextLabel.Text = ChangedName.Text
    end
end)

alright so finally i pressed the button and it worked all things are in the head of the player text are connected to the

ChangedName.Text

and it's all good, BUT for some reason the Billboard gui is not showing up? how come? but i tried putting it manually by going to rightclick the player head >Insert object "BillboardGui" and it worked wth.. ugh..

any answers will be appreciated! thanks!