I have to do a self introduction in my class tomorrow. I need

Tell them that you like lolis, traps, and shitposting on a Honduran finger puppet design pattern e-catalog.

Honestly, nobody is listening and they're just waiting for their turn to speak.

Tell them your name, why you're interested in the course, and say you enjoy a hobby which isn't too weird, but not very notable either. Something like reading or exercising.

If you feel like making a joke, say something you dislike that'll resonate with everyone, like disliking how some people take up the whole pavement when walking or if the class has an examination, taking exams or tests.

don't go
have some self agency

Your best hope is to try and make yourself seem affable and nice. Nobody gives a shit about your hobbies, really.
I always say that I enjoy rock-climbing and snowboarding, when I haven't done either of those in 5+ years.

t. boring loser who understands.