Yeah u should work hard to do so . medicine is not easy department but if u work hard everything is easy . so learning medicine is good decision if u really love help peoples. And also u asked about psychology Some people comment on ur question that psychology is not part of medicine but that is not true. Cuz in medicine there is neuro science and study about human behavior and something like that so if u combine ur medicine knowledge with psychology u will became an excellent doctor. But all this things happen if God say . thank u