I've added my crash course of spirit conjuring on Gumroad. You will find it *HERE*.
The course will get you to get to conjure spirits within 37 days of simple daily practice sessions, structured on 3 levels: beginning, getting accustomed to the forces, conjuring spirits of those forces.
After the 37 days you will get to conjure elemental, planetary, and zodiacal spirits, as well as the 72 spirits of the Goetia. You will do so in a simple and safe fashion, with little setup, tools, and regalia.
Enjoy!