April 11th: Arrive in Inaba. Meet Dojima and Nanako. The game's opening sequence. No choices to make, just follow the story.
April 12th: First day at Yasogami High. Meet Yosuke Hanamura and Chie Satonaka. Explore the school. You'll be introduced to the concept of the Midnight Channel. After school, you'll visit Junes with Yosuke. This is where you first encounter the TV World. Don't worry, you can't enter yet.
April 13th: School day. More introductions. The first murder occurs. The town is abuzz with rumors. You'll have some free time in the evening. Consider reading a book to start boosting your Knowledge or Courage.
April 14th: School. The investigation begins. You'll discuss the case with Yosuke and Chie. In the evening, you'll have another opportunity for free time. Continue building social stats.
April 15th: The second victim is found. The mystery deepens. You'll visit the TV World again with Yosuke and Chie, this time falling in. This is your first taste of combat and the Persona awakening. Follow the tutorial for basic combat. You'll awaken your first Persona, Izanagi. After the initial foray, you'll be back in the real world.