Hello everyone I am 23 years old mechanical engineering student getting his associates this year. I am very determined to pursue a career in physics I have basically taken all of my physics courses and pre requisite for the core physics courses so at my senior college I can declare physics as a major with no problem. In my math classes from Algebra up to Calculus 3 I have gotten all A's. In my physics 1 I got a C it was a very tough professor. I choose to move to physics because it expands my thinking on a whole new level and that gets me going. I am thinking to get into the field of particle physics or nuclear physics still doing my research. One of my aspiration as well is to be an NASA astronaut for USA. I would very much appreciate past physicists or undergraduate students who can offer advice and expectations of this field and how can I improve my self in this field.