Don't let the title and premise of this story fool you. The author took a good idea, gave it a promising start, and ran it into the ground.
The grammar is poor, which would have been excusable had the rest of the story been enjoyable. Unfortunately, it isn't. As is usual for the author, the MC is an idiot who runs on plot contrivances and an OP system instead of being a relatable character. His decisions (and the plot, for that matter), such as they are, aren't motivated by sense or consistent with past characterization, but whatever scene the author feels like writing at the time and whatever character the author wants to dickride or bash, as the case may be. Worldbuilding is minimal, and the frequent POV switches are not only jarring but also unnecessary, seeing as how OOC those other POVs are.
The "hook" of this story, the Jojo system, was also poorly executed. The author wavers between making it OP, and then nerfing his own modifications. Ignoring how canon Stands would have worked in favor of a lighthearted wish fulfillment romp through the setting would have been understandable, if the author didn't make arbitrary nerfs and ignored certain Stands already drawn by the MC. Either make it a roflstomp or restrict the MC to one canon-consistent Stand; the author is nowhere near a good enough writer to figure out a balance between the two.
Updating stability isn't much to write home about either. After an initial burst of activity, updating speed on this story has petered out, as the author focuses on other stories which are more or less minor variations of the same type of story. If you've read one of his stories, you've read them all, and nothing of value will be lost if you skip this one.