Hy guys i m in grade 11 was doing physical science so i decide 2 change my physics to tourism because my physics was weak so i don't know what careers does my subject hold now please help me?? Especially in medical??

check with your school counselor

or, visit a college and talk to the faculty there

Rather than figure out what you can do with what you know, discover what you love, and find out what it will take to succeed in that field.
Talk to someone successful in that field.