Compassion is the solid foundation of a great nurse. If you have that, you are already well on your way. You seem like an intelligent person with a drive to care, especially for those that are so helpless. Confidence is gained by learning a skill well. You will learn many useful skills on your way and there are many ways to test them and solidify them. At my school, we are given open lab hours to practice skills. Whether it's placing an IV, drawing blood, placing a Foley, managing an NG tube, physical assessments or even talking to patients therapeutically, we are all given room to practice. Relax, take a deep breath and do your best. Finish your prerequisites and start looking for schools, assuming you haven't already. Best of luck. Live long and prosper!