I need your correction, please!

I want to be more reliable, especially to my parents and friends, which makes me continuely work hard. As a medical student, I believe that I will become a doctor natually. I often imagine the moment that my patients recover from their diseases with happiness. As for me, I want to travel around the world to appreciate innumerable places of interest, so I have to make enough money to afford this. A reliable doctor will gain more reputation and there will be more people in need try to ask for your help, therefore, I can earn enough money for my traveling plan.