This contemplating your navel certainly can reduce stress but there comes a time where you still have to haul a ss and get things done be it study our hard physical work. Sometimes a poke in the butt with a bayonet, hard work at the gym and hitting the books is just as effective!
Yes. Meditation is a heck of a lot harder than it looks. Sitting around doing nothing is one of the most difficult things to do when you realize how intently our brains are always bouncing around in different directions. Accomplishing this will both help you build confidence by learning that you can achieve something, and the cognitive benefits from clearing the clutter out of your mind will allow your concentration to improve.