How do I save player's data?

Hello, so basically i'am trying to make this script save my player's stats when they logoff and load then when they login. The script is just not working, no idea why, was reading the article "Saving Player Data" in roblox wiki but my current knowledge of lua isn't good enough to let me adjust that script there to the one i have... No idea what the problem is but here is the script:

CashStore = game:GetService("DataStoreService"):GetDataStore("DataStore")
local loadedstats = false
function PlayerEntered(player)
	repeat wait() until player.Character
		repeat wait() until player.Character.Stats
			local stats = player.Character:WaitForChild("Stats")
		local goldnew = Instance.new("IntValue")
		goldnew.Parent = player.Character.Stats
		goldnew.Value = "0"
		goldnew.Name = "Gold"
		local levelnew = Instance.new("IntValue")
		levelnew.Name = "Level"
		levelnew.Parent = player.Character.Stats
		levelnew.Value = "1"
		local xpnew = Instance.new("IntValue")
		xpnew.Name = "Xp"
		xpnew.Parent = player.Character.Stats
		xpnew.Value = "0"
		local constnew = Instance.new("IntValue")
		constnew.Name = "Constitution"
		constnew.Parent = player.Character.Stats
		constnew.Value = ""
		local xptlvnew = Instance.new("IntValue")
		xptlvnew.Name = "Xptlv"
		xptlvnew.Parent = player.Character.Stats
		xptlvnew.Value = "70"
		local skillpnew = Instance.new("IntValue")
		skillpnew.Name = "SkillPoints"
		skillpnew.Parent = player.Character.Stats
		skillpnew.Value = "0"
		local hp = player.Character.Humanoid:WaitForChild("Health")
		local maxhp = player.Character.Humanoid:WaitForChild("MaxHealth")
		local gold = stats:WaitForChild("Gold")
		local level = stats:WaitForChild("Level")
		local xp = stats:WaitForChild("Xp")
		local const = stats:WaitForChild("Constitution")
		local xptlv = stats:WaitForChild("Xptlv")
		local skillp = stats:WaitForChild("SkillPoints")		
		

		wait(5)
		if CashStore:GetAsync("Gold_"..player.Name) ~= nil then
			gold.Value = CashStore:GetAsync("Gold_"..player.Name)
		else
			gold.Value = 0
		end
		if CashStore:GetAsync("Level_"..player.Name) ~= nil then
			level.Value = CashStore:GetAsync("Level_"..player.Name)
		else
			level.Value = 0
		end
		if CashStore:GetAsync("Xp_"..player.Name) ~= nil then
			xp.Value = CashStore:GetAsync("Xp_"..player.Name)
		else
			xp.Value = 0
		end
		if CashStore:GetAsync("Const_"..player.Name) ~= nil then
			const.Value = CashStore:GetAsync("Const_"..player.Name)
		else
			const.Value = 0
		end
		if CashStore:GetAsync("Xptlv_"..player.Name) ~= nil then
			xptlv.Value = CashStore:GetAsync("Xptlv_"..player.Name)
		else
			xptlv.Value = 70
		end
		if CashStore:GetAsync("SkillP_"..player.Name) ~= nil then
			skillp.Value = CashStore:GetAsync("SkillP_"..player.Name)
		else
			skillp.Value = 0
		end
		if CashStore:GetAsync("Health_"..player.Name) ~= nil then
			hp.Value = CashStore:GetAsync("Health_"..player.Name)
		else
			hp.Value = 100
		end	
		if CashStore:GetAsync("MaxHealth_"..player.Name) ~= nil then
			maxhp.Value = CashStore:GetAsync("MaxHealth_"..player.Name)
		else
			maxhp.Value = 100
		end	
		loadedstats = true
		player.Character.IsLoading.Value = false
end

function PlayerLeaving(player)
	if loadedstats == true then 
	local stats = player.Character:WaitForChild("Stats")	
	local hp = player.Character.Humanoid:WaitForChild("Health")
	local maxhp = player.Character.Humanoid:WaitForChild("MaxHealth")
	local gold = stats:WaitForChild("Gold")
	local level = stats:WaitForChild("Level")
	local xp = stats:WaitForChild("Xp")
	local const = stats:WaitForChild("Constitution")
	local xptlv = stats:WaitForChild("Xptlv")
	local skillp = stats:WaitForChild("SkillPoints")
			CashStore:SetAsync("Gold_"..player.Name, gold.Value)
			CashStore:SetAsync("Level_"..player.Name, level.Value)
			CashStore:SetAsync("Xp_"..player.Name, xp.Value)
			CashStore:SetAsync("Const_"..player.Name, const.Value)
			CashStore:SetAsync("Xptlv_"..player.Name, xptlv.Value)
			CashStore:SetAsync("SkillP_"..player.Name, skillp.Value)
			CashStore:SetAsync("Health_"..player.Name, hp)
			CashStore:SetAsync("MaxHealth_"..player.Name, maxhp)
	end	
end	

game.Players.PlayerAdded:connect(PlayerEntered)
game.Players.PlayerRemoving:connect(PlayerLeaving)

Feel free to ask anything if there is something unclear and thank you in advance.