It depends. Sometimes movies or shows labeled as 'Hustle' might draw inspiration from real events but could also have fictional elements added for entertainment purposes.
There's no way to really tell if it's common specifically for someone named Jojo. However, in general, reading fanfiction is a popular activity among fans of many different franchises. The Jojo series has a large and dedicated fan base, so it's likely that there are fans named Jojo who partake in reading fanfiction, but we can't say for sure how common it is without more data.
It might show the characters constantly working hard. They could be seen striving towards their goals, taking every opportunity that comes their way, and not being afraid of putting in long hours or extra effort. That's the essence of hustle.