Yes, magic works. And anyone can use it.
YOu say you feel it doesn't work, so I have some questions.
What is it you are trying to accomplish. Things like controlling fire, physical shape-shifting, and flying are not possible to do with magic. If you are attempting these, that is why. Magic does not and cannot break the laws of reality. If anything, it works along side them or bends them subtly.
Secondly, do you have will, intent, and action?
Will is making it happen with your ability to do magic, literally willing the desired effect to happen and altering the universe. It's knowing and using your psychic or spiritual power to do so.
Intent is knowing what your desired outcome is. What you want to do is important, and as I stated previously, there are simply things that magic does not do.
Action is taking action to better the chance of a spell working. For example, if you do a spell to land a job, but refuse to do anything that might land you a job, like applying, your spell will not work.