If you are considering a career in the medical field, you should go in with your eyes open and with a plan in place. Many people are motived by a career where they can help people. You will need to be sure that your reasons for getting into the medical field are enough to keep you motivated in your career.
The medical profession is extremely stressful, and without the endurance and commitment necessary, you will struggle to be successful. This is true whether you are pursuing a registered nurse career or a career as a highly skilled specialist. As long as what you hope to gain is motivating enough to get you through the hard times, you should be successful.
Your first step should be to get adequate education and training that will lead to success in your given career. This can be expensive with an equally high investment of time. Be sure you have the finances to make it through the program. In the case of becoming a physician, you will be spending 15 years in gaining the needed education.
You will want to ensure that your skill set falls in line with what is necessary to be successful in a medical career. You will need to have high levels of interpersonal skills, as well as an aptitude for technical and mathematical training, not to mention a very strong work ethic.
Perhaps most importantly, you need to determine exactly which field in the medical world best fits your personality and goals. For example, if you enjoy working with children, you may prefer working in pediatrics, whereas if your strengths are more mechanical, you may want to pursue a more complex surgical direction.