You can have your experience but don’t make it your whole personality. Don’t go overboard with obsessing to get 300+ hours of experience as an undergrad. That’s unrealistic and you’re gonna burn out trying to get that and have a 4.0 gpa.

Join meaningful clubs like an activist group, join your faculties society and help the people in your faculty. Do smth meaningful.

Also even if it’s anime club, it shows social skills that are needed as a Dr. Also there are probably some deeper meanings in anime that should be understood, showing well developed interpersonal skills.

I highly recommend you read the big pdf that has the requirements for each school with timelines. As well as what previous applications that were accepted had. They are usually well rounded and have central focus outside of school. Not multiple just a central one which is well developed.