Ok obnoxious links as promised.. A lot of it is very lengthy and overly complicated so I wouldn't recommend most of these unless you're really bored. And as with everything take it with a grain of salt.
The Universe
https://www.huffingtonpost.com/deepa...b_2992746.html
Consciousness
https://www.youtube.com/watch?v=OrcWntw9juM&t=292s
Sacred Geometry
SACRED GEOMETRY ?THE BUILDING BLOCKS OF THE UNIVERSE - Awareness of Nothing https://www.youtube.com/watch?v=zoqTNpok6zw
Religion (sorry to bring in astrology as it can kind of be a dogmatic "religion" of its own, but this video is what got me into it in the first place)
https://www.youtube.com/watch?v=jJSpujHhaGQ&t=727s
Addiction and Transcendence as Altered States of Consciousness
http://www.atpweb.org/jtparchive/trps-26-94-01-001.pdf
Book Recommendation: Reality Is Not What It Seems by Carlo Rovelli
Full disclosure my interest in these subjects- minus the last two- was sparked during my drinking days. Throw in some stimulants (adderall) and I was really walking a fine line there between "enlightenment" and insanity. I'm now able to laugh at some of it (and myself) but am happy to report the interest is still very much there for me sober.