You will receive the step-by-step PDF instructions and XML parts list file in an email. The XML file's contents can be uploaded to a Bricklink Wanted List to make it easier to find the pieces you'll need. A PDF guide for how to upload the file's contents to Bricklink is also included.
You can download the XML file here so you can check how many pieces you may have already before getting the instructions. If you're unsure how to upload an XML file to Bricklink, check out this short guide here.
Thanks for your support, and you can contact me at firstname.lastname@example.org with any questions!