I personally never astral projected before, however I am open to the whole phenomena being real, but not one-hundred percent. What happened that made you fully believe that this was real. How did it change your view on life in this physical realm? Thanks!
It is (was) NEVER about belief (for me). Beliefs, unfortunately, can severely limit and impede our perception. A direct, personal experience WILL change your view (e.g., with a new perception). Learn how, and create your own experience. As communicated to me recently by my non-physical helpers, "You are the captain of your own ship" (e.g., we will not do it for you).
Those with out of body experiences know the difference between the biological brain (belief) and the conscious mind (knowing). Learn to see beyond your physical body, because then you will KNOW the answers you are seeking.
The evidence (present day) for OBE's is overwhelming. Even in the 1980's there was NOT a lot written about it popularly (yet). The 1990's brought a number experiencers out of the closet. Therefore, my suggestion is to read someone slightly more current than Monroe but who is an established OBE-projector of 20 years or more (e.g., for example William Buhlman has over 40 years of experience). There are many others. Frank Kepple has a couple of decades of experiences and his stuff is free on Xanth's web site (some of it is here also).
I like to recommend Buhlman because I had my first OBE about 6 weeks after reading one of his books. That experience changed my "curiosity and hunches" to "knowing". He conducts several experiential classes at the Monroe Institute annually. He also summarizes "how to" for free here:www.astralinfo.org
(note several "how to" guides on the menu bar)www.astralinfo.org/astral-projection-methods/
I leave you with this thought ... it is time for you to make your own decision. Good luck!