Help please I'm confused

Toxic

So I just got my first birth control pills today (yay!) But my period is coming up 9 days and my doc said I should take it tomorrow or however I like but I don't wanna mess up with my choices

Should I take it tomorrow on Sunday or wait

Plus If I hit my period sooner should I use the fourth week set of pills or the first week set of pills?

I'm so confused please help lmao