URGENT, what pill do I Take!!??

A.K.A ⚡️💪🏽 • Keto+HIIT= happy me🥓🍳🥗

This sounds stupid, but but this is my first pack and i’m confuzzled.

My doctor told me to start taking the pills when i start my period, today, but i have ran into an ordeal. Do i take the 1st active pill? (Where it says start) or do i take a reminder pill? The sunday start and day one start instructions are very vague, please help.