Power meditations increase longevity and even the quality of life, but as far as "living as long as we want," we have to be careful not to get caught up in things that most people won't be able to achieve in one lifespan.
But basically with enough power and wisdom, yes, something along those lines is possible. It also just depends on your views and knowledge of immortality.
Keep focusing on your meditations, because as of right now, understanding yourself and your own power is what's most important. If given more time you're still interested in finding out more, I'm sure the knowledge will come to you.