Way to download 'Transactions' data from my MakerWorld profile

If it was Amazon, Google or Apple, they put download your data links in your account settings, you click it and it generates it, and sends you an email a short while later.

Very simple, as it does not need to be complicated.

If we are going the very easy route…

Let someone else do that bit. You just choose a suitable output format and Google search for an online tool.