Magic Forums

I am having a bit of trouble understanding which magic does exist and doesn't. Ever since I started researching magic, my mind has been a bit changed on how I view things. But this wasn't cut out too clear even after re reading multiple posts. And I was told if it works in reality yes it will, but that doesn't always cut it. I haven't bother casting any spells but a few really basics which one worked and the other didn't but that's besides the point. Just if you have any forum posts/threads, links or just something to help please do. Thank you in advance. :)