I would like to become a doctor but I don't know the steps on ding so. When applying to colleges which major am I suppose to write?

Hi there, here are some resources for you:
How To Become a Doctor | College Hunter Blog
How to Become a Doctor - "How To Cut Someone Open and Go Straight to Lunch..."
Medical School: Advice on Medical Careers and on becoming a Doctor for High School Students

Hope this helped..