New to Birth Control

I went to the gynecologist yesterday and decided to start taking the pill , I’m a little confused on how it works since I’ve never been on any birth control, Since my last period started on the 4th of January, my doctor said I have to wait for my next period to start and take it on a Sunday.. So if my next cycle starts on Tuesday, February 6th do I start taking the pills on Sunday the 11th?? Any help is appreciated !!