Here are two suggestions.
(1) Any volitional act that is good for yourself and/or society is moral, while any volitional act that is bad for yourself and/or society is immoral. The only rule is against initiating force, threats of force, or fraud against another person or their property. This will appeal to those who are atheist and wish not to believe in spirits.
(2) The only sin is stupidity. Go ahead and learn about those spiritistic practices. Try delving into the depths of astrology--hint: What you see in the paper is way too superficial to be more than entertainment. Work with energy. Delve into planetary squares. Learn the runes. Work the Ouija board and Tarot cards. This approach is more for those who believe in spirits and wish to find Satan.
Just remember, in the LIE-ble, it was joke-hova god that had to withhold knowledge from people. Satan wanted us to be free, and this is blatant if you read that section of Genesis without bias. Do you really wish to make that thing that wanted you enslaved happy? Any religion that worships joke-hova, allah, or jesus is bogus--all three major platforms and anything they polluted is going to lead to damnation.