There are a number of very good Law of Attraction courses that can be taken online or studied in the real world.

This site takes a look at what you might expect to find and what you can learn.

In order to truly learn and understand how the Law of Attraction works and also just exactly what it is, you really do need to study it closely and in as much detail as you can.

The best way I found was reading books, watching videos of lectures by prominent experts in the field and taking online courses created by those same experts.