How can I select a huge amount of values when saving?

Yes, I did use a simulator tutorial script because I'm not good at services.

I'm trying to save a huge chunk of values and I used :GetChildren() and it doesn't work.

I'm trying to find an alternative way to save tons of values without putting tons of functions.

Here is the script:

local DS = game:GetService("DataStoreService"):GetDataStore("StatData")
game.Players.PlayerAdded:Connect(function(plr)
	wait()
	local plrkey = "id_"..plr.userId
	local savevalue = plr.leaderstats.Coins
	local savevalue2 = plr.leaderstats.Gems
	local savevalue3 = plr.leaderstats.Power
	local savevalue4 = plr.Stats.ElementInv:GetChildren()
	local savevalue5 = plr.Stats.PetInv:GetChildren()
	local GetSaved = DS:GetAsync(plrkey)
	if GetSaved then
		for e = 1,#savevalue4 do
			for a = 1,#savevalue5 do
				local save4 = savevalue4[e]
				local save5 = savevalue5[a]
				savevalue.Value = GetSaved[1]
				savevalue2.Value = GetSaved[2]
				savevalue3.Value = GetSaved[3]
				save4.Value = GetSaved[4]
				save5.Value = GetSaved[5]
			end
		end
	else
		for e = 1,#savevalue4 do
			for a = 1,#savevalue5 do
				local save4 = savevalue4[e]
				local save5 = savevalue5[a]
				local NumbersForSaving = {savevalue.Value, savevalue2.Value, savevalue3.Value, save4.Value, save5.Value}
				DS:GetAsync(plrkey, NumbersForSaving)
			end
		end
	end
end)
game.Players.PlayerRemoving:Connect(function(plr)
	local savevalue = plr.leaderstats.Coins
	local savevalue2 = plr.leaderstats.Gems
	local savevalue3 = plr.leaderstats.Power
	local savevalue4 = plr.Stats.ElementInv:GetChildren()
	local savevalue5 = plr.Stats.PetInv:GetChildren()
	for e = 1,#savevalue4 do
		for a = 1,#savevalue5 do
			local save4 = savevalue4[e]
			local save5 = savevalue5[a]
			DS:SetAsync("id_"..plr.userId, {savevalue.Value, savevalue2.Value, savevalue3.Value, save4.Value, save5.Value})
		end
	end
end)

-- Saving
local SaveTable = {}
for i, v in pairs(plr.leaderstats:GetChildren()) do
	table.insert(SaveTable,{v.Name..v.Value})
end

-- Loading

for i, v in pairs(DS:GetAsync("id"..plr.userId)) do
	if plr.leaderstats:FindFirstChild(v[1]) ~= nil then
		plr.leaderstats[v[1]].Value = v[2]
	end
end

Might work im not sure, if it doesn't it kinda gives an idea on how to do it