Save the position color and material of all parts in a model and load?

I want to store and load all the pieces in a model, but I do not know how to do that. I thought about doing something like this:

local DSS = game:GetService("DataStoreService")

local datastore = DSS:GetDataStore("GeneralSaveData", "Players")

function generateDataKey(player)
    local ret = ("uid_" .. player.userId)
    return ret
end

function generateDataTable(player)
    local dataTable = {
		
        game.Workspace.TestModel:GetChildren()
		
    }
    return dataTable
end

function saveDataForPlayer(player)
    local key = generateDataKey(player)
    local data = generateDataTable(player)
    datastore:SetAsync(key, data)
end

function inputDataToPlayer(player, data)
	if data ~= nil then
		
	
    for datatoload, data in pairs(data) do
	
	data.Parent = game.Workspace.TestModel
	
end
end

	
end
end

function loadDataForPlayer(player)
    local key = generateDataKey(player)
    local data = datastore:GetAsync(key)
    inputDataToPlayer(player, data)
end

game.Players.PlayerAdded:connect(function(player)
	loadDataForPlayer(player) 
	wait ()
	while true do
		wait (60)
     	saveDataForPlayer(player) 
	end
end)

game.Players.PlayerRemoving:connect(saveDataForPlayer) 

But this script obviously doesn't work. How do you solve this problem?

If there are any I would be happy about tutorial links or similar I did not find any