Magick is rarely about the universe. Sure, magick is in the universe, but the (will)power and focus to practice magick is within you.
And you do not need to believe for magick to work. In fact, what is worse than anything is lusting after results. So those that believe and believe and focus and want and desire and dream...are obsessing and will likely mess up the casting. It's about doing what you need to do and forgetting about it! So chill out, sit a spell or two, and don't forget to learn your basics!
Stay away from the fantasy spell section. Those are not attainable things. They were written by people that know nothing about magick. They are in a section of their own so that people can view what is fictional.