How can I create a datastore that saves a players progress-?

Rest of Title: when the player leaves but loads the data back when they rejoin the game

So my tycoon format and layout is based off of GamerM8's Tycoon Series, I have tried looking at other videos of how to make a data saving datastore and modify it to try and save the tycoon I am using/made. The problem is, is that I don't know how to save and reload like droppers, walls, and stuff.

This is the buying function:

for i,v in pairs(Buttons:GetChildren()) do
	local NewItem = BoughtItems:FindFirstChild(v.Item.Value)
	if NewItem ~= nil then
		Items[NewItem.Name] = NewItem:Clone()
		NewItem:Destroy()
	else
		v.Transparency = 1
		v.CanCollide = false

		v.ButtonPart.BillboardGui.TextLabel.Visible = false
		
	end
	if v:FindFirstChild("Dependency") then
		coroutine.resume(coroutine.create(function()
			v.ButtonPart.Transparency = 1
			v.ButtonPart.CanCollide = false
			v.ButtonPart.BillboardGui.TextLabel.Visible = false
			if BoughtItems:WaitForChild(v.Dependency.Value, 100000) then
				v.ButtonPart.Transparency = 0
				v.ButtonPart.BillboardGui.TextLabel.Visible = true
				v.ButtonPart.CanCollide = true
			end
		end))
	end
	v.ButtonPart.Touched:Connect(function(hit)
		if hit.Parent:FindFirstChild("Humanoid") then
			local Player = game.Players:GetPlayerFromCharacter(hit.Parent)
			if Values.OwnerValue.Value == Player then
				if v.ButtonPart.CanCollide == true and v.ButtonPart.Transparency == 0 then
					if Player:WaitForChild("leaderstats").Money.Value >= v.Price.Value then
						Player.leaderstats.Money.Value -= v.Price.Value
						Items[v.Item.Value].Parent = BoughtItems
						v:Destroy()
					end
				end
			end
		end
	end)
end

And this is my Data saving script (its in the same script)

local DataStoreService = game:GetServices("DataStoreService")

local PlayerData = DataStoreService:GetDataStore("PlayerData")
local UserOwnsTycoon = false
local data = {}

game.Players.PlayerAdded:Connect(function(player)
	UserOwnsTycoon = false
	while true do
		if player.leaderstats.OwnsTycoon == true then
			UserOwnsTycoon = true
			break
		end
	end
	while true do
		if UserOwnsTycoon == true then
			PlayerData:GetAsync(player.UserId)
			data = PlayerData:GetAsync(player.UserId, data)
			-- Don't know why to put here
		end
	end
end)



game.Players.PlayerRemoving:Connect(function(player)
	for i,v in pairs(BoughtItems:GetChildren()) do
		data = v.Name
		PlayerData:SetAsync(player.UserId, player.leaderstats.Money.Value, data) -- Didn't work the first time I tried
	end
end)

This is what the model layout looks like, and the items in "BoughtItems" are not there until you buy them

Can anyone please help me? And last note, this is based off of GamerM8s Tycoon Series.

maybe change newitem to the localplayers leaderstats and make a model of the tycoon and also include that in the datastore