How many meal prep containers should I have?

I’m decently new to meal prepping. I have no idea how many containers I need. For essentially 1 weeks worth of food.

I also don’t know if I should be doing breakfast, lunch, and dinner in my plan or just lunch/dinner.

I’m googling recipes and such and trying to get comfortable making food, but for the most part I have no idea what direction to go for meal Prep.