There are many ways to study a “course”.

Mentor: Mentorship – Wonder Wizards (And others. You may find someone locally!)

School: Magic Mystery School : Home (There are a few good ones, even some online. Occasionally you will find a course at a college.)

Books:

• 13 Steps to Mentalism by Corinda: CORINDA: 0793631119851: Amazon.com: Books
• Practical Mental Magic (Dover Magic Books) – Kindle edition by Theodore Annemann. Humor & Entertainment Kindle eBooks @ Amazon.com.
• Psychological Subtleties Vol. 1 by Banachek
• Psychological Subtleties 2 (PS2) by Banachek Book: Banachek
• Psychological Subtleties 3 (PS3) by Banachek
• etc.