Power, is everywhere, and in everything. It is, everything, in fact. The first you can do, is learn to shut up your monkey mind, your fears, your doubts, your insecurities-and all the utter pointless chatter. Because that chatter is what holds your universe together, as it is. If you want to change it, then shut that up.
Start by observing your breath, the world around you. Direct your full attention to your breath, and enjoy being in your body, for a time. Once you can, almost instantaneously, pour the totality of your attention into one single action, then you will have the faculties needed to fully focus on any given expected outcome, or desire, in any other magical operation.