Here are some quality websites recommended by your Professor
Works of Apuleius: Metamorphoses and his Defense (or Apology, or Discourse on Magic) from the Open Library at the Internet Archive
English translation of his Defense (or Apology, or Discourse on Magic) from the Internet Classics Library
Project Gutenberg: Works by Apuleius, downloadable…
The Spectacles of Apuleius: Graduate seminar on Roman spectacles held at the University of British Columbia. Good information, and with English translations!