Does meditating really help?

With my exams coming up, I’m starting to feel more and more anxious as the clock is starting to count down. I heard that meditation’s a good practice to keep yourself calm, and to clear your mind. I’m kind of skeptical that this would work for me, as I’m very figety and impatient…but I’m willing to give it a try. Does anyone have any experience in meditating? What’s a good way for me approach this (as I have no idea how to start, and how to go about doing it)? And please don’t suggest yoga – I’m probably the least flexible person in the world haha