Thankfully there are existing organizations in this day and age where Thelema and the teachings of Crowley are essential. Here are some of the primary organizations and Orders…
• O.:T.:O.: (Ordo Templi Orientis; Order of the Temple of the East; Order of the Eastern Templars)
• A.:A.: (Argentum Astrum)
• Ecclesiastic Gnostic Church
• Thelemic Order of the Golden Dawn
• Temple of Thelema
• College of Thelema
• The Fraternity of the Hidden Light
These groups still exist and can be found online and possibly in your local cities.
Also try this free pdf e-books:
Greg Wotton - Suffering A Thelemic PerspectiveAlvin Boyd Kuhn - A Modern Revival Of Ancient Wisdom