Hi everyone, I am Shing, I am 24 now. I start my college when I was 20. But unfortunately, 1.) I was facing serious medical problems at the same time for over the past years. 2.) I cannot agree the way my school does education. So basely, I couldn't do anything but endure those pain and sorrow in the past time. As an result, I got lousy GPA. Nevertheless, I learned Classical Mechanics fairly well, I can do calculus without difficulties; besides, I don't understand Physics. besides, 1.) I am very well equipped back in terms of high school physics and math. 2.) I have learned to observe myself whenever my medical problems reoccur. 3.) I am a good self-teacher 4.) My logic is fair. but my problems are: 1.) I do not agree the way my school does education 2.) getting a bit too old (24 with mere knowledge of classical mechanics and calculus) as for 2.) I think the question is whether or not I have passion for physics. The answer is obviously Yes, but once exam is involved (my university using quite a spoon-feeding way of education) I found myself quite depressed. I need some suggestions, or advices, I am not sure (presuming 31 when I gain my PhD degree) to start a career of physicist at age of 31 is too bad. Thank you for reading and sorry for my lousy English used here. Wish you all the best.