How to Summon a demon?
This question has been asked before in regard to the Goetic entities. They are demons and demons are malign entities. Granted there are varying degrees of malign but you'll notice that in the summonings there are a great many self protections. such summonings are not to be undertaken lightly nor are they for novices. It is vitally important you have the proper equipment and training to work with these entities and even years of experience will not prepare you for all the tricks they are capable of pulling. My advice to you is to cleanse and banish the summoning area immediately as well as all your personal space. Make sure the rituals you use are properly done and prepared for.
I usually call the Goetia "entities" not demons. Facing and working with them does have it's benefits but, I do advise building up to that point. Practical and basic banishing and meditation are important for building this base. Knowing who you really are is also very important.
The purpose of goetic magic is dependent on the entity being summoned. The tasks of the conjured entities may vary from curing diseases to destroying a person's personality, love, or fame, all depending upon the intention of the one who summons. The temperament of the entities can vary from fawning and obedient to fierce and defiant.
Among the practice of goetic magick is the summoning of angels, a particular purpose is for one to act as a guardian angel. For every Goetic entity or prince there is a Shemhamphorasch for example for Vassago there is Sit.
Build a strong foundation before trying this again. And study all you can beforehand (know it in your head in other words)
Any additional info will be greatly appreciated