Once you have read joyofsatan.org, understood what Spiritual Satanism is about and who Satan is, you should get on a meditation program. Meditation will allow you to open your chakras and start empowering your soul. Which is necessary to be able to do magick.
The 40 days program by HP Cobra is ideal to get a quick start and good habbits. Later you'll make your own schedule according to your needs.
Welcome to the satanic family !
