Lost in campus

My 1st day in XXX university, I got lost when I search for the Teacher's office, and seriously.. The signboard confusing me and I am too introvert to speak with people even with my dorm roommates!! The university is bigger and what's shock me the most is there's literally some students wear sleep pants!! Are we even allowed to wear it to classes😭? I dont have any orientation at my first day because I'm the second intake and welp I'm the only one student for second intake in my subject so I have to mix with the first intake students, It's fckin awkward and I think I have social anxiety now😭, everyone like too pretty and before I move in to my dorm, I do get dye my hair and trimmed it myself, believe me or not.. It's pretty ugly and weird. It's awesome for someone who can start a topic with stranger and then become friend afterwards.. Teach me HOWWWW 😭😭😭