[URGENT] I cannot save my table to DataStore?

So I am trying to make a table that saves your information, all seems to work well but it does not load the previous session's information. Here is my server script in Workspace so far:

local ds = game:GetService("DataStoreService")
local played = ds:GetDataStore("Played")
local invs = ds:GetDataStore("Inventory")
game.Players.PlayerAdded:Connect(function(plr)
	local playedbefore = Instance.new("BoolValue",plr)
	playedbefore.Name = "PlayedBefore"
	playedbefore.Value = played:GetAsync(plr.UserId,playedbefore.Value) or false
	wait()
	if playedbefore.Value == true then
		local inv = {}
		invs:GetAsync(plr.UserId,inv)
		wait()
		local num = table.getn(inv)
		if num >= 1 then
			for i, v in pairs(inv) do
				local cl = game.ReplicatedStorage:WaitForChild(inv):Clone()
				local cll = game.ReplicatedStorage:WaitForChild(inv):Clone()
				cl.Parent = plr.Backpack
				cll.Parent = plr.StarterGear
			end
		end
	else
		local inv = {"Sword"}
		wait()
		local num = table.getn(inv)
		if num >= 1 then
			for i, v in pairs(inv) do
				local tool = table.unpack(inv,i,i)
				local cl = game.ReplicatedStorage:WaitForChild(tool):Clone()
				local cll = game.ReplicatedStorage:WaitForChild(tool):Clone()
				cl.Parent = plr.Backpack
				cll.Parent = plr.StarterGear
			end
		end
	end
end)
game.Players.PlayerRemoving:Connect(function(plr)
	local inv = {}
	for i, v in pairs(plr.StarterGear:GetChildren()) do
		table.insert(inv,#inv,v.Name)
		v:Destroy()
	end
	wait()
	invs:SetAsync(plr.UserId,inv)
	if plr:WaitForChild("PlayedBefore").Value == false then
		played:SetAsync(plr.UserId,true)
	end
end)

There is also a part that when you touch it you get another tool. Here is it's server script:

local db = {}
script.Parent.Touched:Connect(function(hit)
	if hit:FindFirstAncestorOfClass("Model") then
		local char = hit:FindFirstAncestorOfClass("Model")
		if game.Players:GetPlayerFromCharacter(char) then
			local plr = game.Players:GetPlayerFromCharacter(char)
			if db[char] == true then
			else
				if plr.StarterGear:FindFirstChild("Iron Sword") then
				else
					db[char] = true
					local cl = game.ReplicatedStorage:WaitForChild("Iron Sword"):Clone()
					local cll = game.ReplicatedStorage:WaitForChild("Iron Sword"):Clone()
					cl.Parent = plr.Backpack
					cll.Parent = plr.StarterGear
					wait(2)
					db[char] = nil
				end
			end
		end
	end
end)

There are two empty tools I use to test this in ReplicatedStorage. One is named: "Sword" and the other is named: "Iron Sword". When I leave and join back it doesn't load my previous items.

So to conclude, everything here works except the saving of the table upon leaving. Any help would be greatly appreciated.

-PrismaticFruits

EDIT So I saw the tutorial given to me in the answers and modified my script. It still does not work. I am also wondering, why isn't the table saving when the thing below it is? I think there is something wrong with the saving/loading of the table. Anyway here is my modified script:

local ds = game:GetService("DataStoreService")
local played = ds:GetDataStore("Played")
local invs = ds:GetDataStore("Inventory")
local function load(plr)
    local playedbefore = Instance.new("BoolValue",plr)
	playedbefore.Name = "PlayedBefore"
	playedbefore.Value = played:GetAsync(plr.UserId,playedbefore.Value) or false
	wait()
	if playedbefore.Value == true then
		local inv = {}
		invs:GetAsync(plr.UserId,inv)
		wait()
		local num = table.getn(inv)
		if num >= 1 then
			for i, v in pairs(inv) do
				local cl = game.ReplicatedStorage:WaitForChild(inv):Clone()
				local cll = game.ReplicatedStorage:WaitForChild(inv):Clone()
				cl.Parent = plr.Backpack
				cll.Parent = plr.StarterGear
			end
		end
	else
		local inv = {"Sword"}
		wait()
		local num = table.getn(inv)
		if num >= 1 then
			for i, v in pairs(inv) do
				local tool = table.unpack(inv,i,i)
				local cl = game.ReplicatedStorage:WaitForChild(tool):Clone()
				local cll = game.ReplicatedStorage:WaitForChild(tool):Clone()
				cl.Parent = plr.Backpack
				cll.Parent = plr.StarterGear
			end
		end
	end
end

local function save(plr)
    local inv = {}
	for i, v in pairs(plr.StarterGear:GetChildren()) do
		table.insert(inv,#inv,v.Name)
		v:Destroy()
	end
	wait()
	invs:SetAsync(plr.UserId,inv)
	if plr:WaitForChild("PlayedBefore").Value == false then
		played:SetAsync(plr.UserId,true)
	end
end

game.Players.PlayerAdded:Connect(function(plr)
   load(plr)
end)

game.Players.PlayerRemoving:Connect(function(plr)
    save(plr)
end)
game:BindToClose(function()
    for _, client in ipairs(game.Players:GetPlayers()) do
		coroutine.wrap(save)(client)
		wait(5)
    end
end)

It's likely it has nothing to do with table not saving but more in general. PlayerRemoving event as datastore saving is unreliable when the last player leaves. especially when u test it out in studio

playerRemoving doesnt work in the following conditions:

• The last player leaves
• The developer manually shut them down via the game page
• A network error is encountered and the server is forced to shut down

see this article how to properly save