No. Each Jojo OVA may focus on different arcs or aspects of the Jojo's Bizarre Adventure story. They often have their own unique plotlines and character developments that set them apart from one another.
To read JoJo manga, you have a few options. You could look for it at your local comic store, or subscribe to online manga reading services that offer it. Another way is to borrow from a library that stocks it.
Maybe it's because of the style. Some buff cartoon characters might have similar features to JoJo characters in terms of body proportions or expressions.
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.
Occasionally, her short stories end with an open - ended situation. This leaves the reader to imagine what might happen next. It makes the reader think more deeply about the characters and their potential futures.
Perhaps this Jojo is interested in exploring different interpretations and stories within the Jojo universe that fans have come up with. Fanfiction often takes the existing characters, settings, etc. from the original Jojo series and creates new and unique storylines. So, this Jojo might be a big fan of the series and wants to see what other fans have imagined.