It's actually a fictional story. The plot and characters are made up by the author's imagination. There might be elements inspired by real events, but as a whole, it's not based on a true account.
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.
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.
I'm not sure specifically as I haven't read it. It could be about a place called the Red Lands. Maybe it's a story of adventure, love or mystery set in that area.
I'm not sure specifically as there could be many novels named in relation to 'Lands End'. It might be about the area called Lands End, perhaps with a story of adventure, mystery or local history set there.