Your most welcome
The concept of certain practices (sigils, rituals) working for specific purposes is outdated and probably from a particular tradition (Qabballah), in my opinion. Why not make your own ritual up for what you wish to achieve? You're very concerned about doing things the "right" way. I get like that to, but it gets nothing done.
Change a belief with a sigil? Give it a try. If it works there's your answer. If not try again - after all it's a big change for your first try at sigils. Perhaps get proficient with getting results and then hammer away at reality
@Whitelotus & elucidate:
Demons - Inherently evil entities yes? That is what we assume, depending on your belief. Magic uses demons just like gods, angels and now superheroes. There are certain systems that work with summoning demons (Goetia) to get things done. Here's a real world example we can all relate to: Did you know there are services (programs) running underneath your computers application layer you can't see? Doing work behind the scenes Guess what there name is? Daemons. An old spelling but an accurate one
There are bad people in the world, why wouldn't there be bad spirits? Like bad people some of them have skills which can be handy. In saying that I haven't done it and I don't advocate it as wise - but credit where credits due.
Well if I spelled it Magick it's be easier to google
It is a spirituality in some forms - it can be used for devotion or results . However, before there was Steve Pavlina, IM, LoA, The Secret, The New Age, Reiki, and even before Spiritualists... There was the occult. Groups like The Golden Dawn, Thelema, The Eleusinian Mysteries, people like Aleister Crowley, Austin Osman Spare, Dion Fortune. Further back to the middle ages John Dee - astrologer to Queen Elizabeth. Further again to the Ancient Greek Mysteries - heard or the Oracles of Delphi? Take the Jewish path through Qabbalah. Or maybe some hoodoo a clashing of Shaminic practice and Catholicism. Shamanism from around the world is in it's own way the beginning of all spirituality.
That magick dude.
Why don't I personally show the world? I'm still on my training wheels