A legitimate course separates spiritual intuition from psychological manipulation. "Tarot Card Success" dedicates an entire module to ethics:
While controversial, the Internet Archive (archive.org) holds thousands of out-of-print tarot courses. Search for "Tarot Card Success" under the Texts section. You will often find scanned workbooks from the early 2000s that are legally available due to expired copyrights.
This is not a PDF cheat sheet. This is a full-spectrum audio/visual and workbook-based curriculum. Here is exactly what you get when you access the Tarot Card Success - The Complete Tarot Reading Course free download: