I wrote a piece of code so it could you check if someone did the tutorial but it is not working?

So my script is not working but I get no errors. I probably just did something wrong with coding since I'm a beginner, thanks in advance.

The part is not changing color so it gets stuck somewhere.

thanks in advance

local dataStoreService = game:GetService("DataStoreService")
local experienceStore = dataStoreService:GetDataStore("PlayerExperience")
local findJoinBool = game:FindFirstChild("FirstJoin")


game.Players.PlayerAdded:Connect(function(player)
	local dataStoreFolder = Instance.new("Folder")
	dataStoreFolder.Parent = player
	dataStoreFolder.Name = "dataStoreFolder"
	if player.dataStoreFolder:FindFirstChild("FirstJoin") then
		print("Firstjoin is true, player plays without tutorial")
		game.Workspace.Testpart = BrickColor.new("Deep blue")



		if not player:FindFirstChild("FirstJoin") then
			
			local boolV = Instance.new("BoolValue")
			boolV.Parent = dataStoreFolder
			boolV.Name = "FirstJoinTutorial"
			boolV.Value = false
			local tutorialReady = Instance.new("BoolValue")
			tutorialReady.Name = "TutReady"
			tutorialReady.Parent = "dataStoreFolder"
			tutorialReady.Value = true
			print("FirstJoin created")
			game.Workspace.Testpart = BrickColor.new("Deep orange")
			
		end
	end


end)