Your journey in Inaba begins with your transfer to Yasogami High. This month focuses on introductions, establishing your daily routine, and the initial discovery of the TV World. Pay attention to the tutorial messages as they introduce core game mechanics.
During April, your primary goal is to progress the story and unlock the ability to enter the TV World. Don't worry too much about Social Links just yet, as many won't be available until May. Focus on attending school, meeting your new classmates, and getting a feel for the town of Inaba. The first few days are heavily scripted, so just enjoy the narrative.