How to use pcall to prevent datastore errors?

LoadData = function(plr,Level,EXP,Coins)
    local GetData = PlayerStats:GetAsync(plr.UserId)
    if GetData then
        Level.Value = GetData[1]
        EXP.Value = GetData[2]
        Coins.Value = GetData[3]
    else
        Level.Value = 1
        EXP.Value = 0
        Coins.Value = 0
    end
end

SaveData = function(plr)
    local lstats = plr:FindFirstChild("leaderstats")
    if lstats ~= nil then
        local Level = lstats:FindFirstChild("Level")
        local EXP = plr:FindFirstChild("EXP")
        local Coins = lstats:FindFirstChild("Coins")
        if Level ~= nil and EXP ~= nil and Coins ~= nil then
            local tablestats = {
                Level.Value,
                EXP.Value,
                Coins.Value
            }
            local GetData = PlayerStats:GetAsync(plr.UserId)
            if GetData then
                PlayerStats:UpdateAsync(plr.UserId, function() return tablestats end)
            else
                PlayerStats:SetAsync(plr.UserId, tablestats)
            end
        end
    end
end

This is my current datastore script to save player data, I tried using pcall functions to prevent errors that might happen but it just broke the entire script so I removed it. How do I properly prevent errors that may occur? Is there any way to make one happen so I can see how the script handles it?