If you’re starting from scratch, begin with how to cleanse and protect yourself and your space… we have a bunch of tutorials on Spiritual Hygiene Basics in the free forum tutorials.
Doing magick, especially black magick lights you up on the astral and attracts entities, including parasites, so you’ll want to know how to keep yourself clean and clear. You don’t want to make more trouble for yourself than you’re trying to fix.
Lists of lists of tutorial are here, so are lists of recommended books: