I cannot get this overhead ranking to work, any ideas?

So I have an overhead ranking thing shown below, I cannot get it to work, any advice?

local billboardgui = game:GetService("ServerStorage"):waitforchild("BillboardGui")

game.Players.PlayerAdded:Connect(function(player)
 
player.CharacterAdded:Connect(function(character)
 
player.Character     
 if player.Name ==  "Djnikola789" then
       local clonedgui = billboardgui:Clone()
       clonedgui.TextLabel.Text = "Creator"
       clonedgui.TextLabel.TextColor3 = Color3.fromRGB(165,7,163)
       clonedgui.Parent = game.Workspace:WaitForChild(player.Name).Head
          end
  
      end)
  
 
 end)

Syntax Errors on your code

Line 1 its supposed to be :WaitForChild with capitals

remove line 7 its useless

Next time you should open output window in studio to be able to see the errors that is happening and you can correct it accordingly

Try this.

local billboardgui = game:GetService("ServerStorage"):WaitForChild("BillboardGui")

game:GetService("Players").PlayerAdded:connect(function(player)
	game.Workspace.ChildAdded:connect(function(char)
		if char:FindFirstChild("Humanoid") then
			if player.Name == "Djnikola789" then
				local NewGui = billboardgui:Clone()
				NewGui.clonedgui.TextLabel.Text = "Creator"
     			NewGui.TextLabel.TextColor3 = Color3.fromRGB(165,7,163)
				NewGui.Parent = char:WaitForChild("Head")
			end
		end
	end)
end)