Well, one way could be to have a chat with Van's friends who might know. Or, look for any posts or comments he's made related to Story of Seasons on gaming forums.
To get Van's favorite story of the season, you could try looking at their recent social media posts or asking their close friends for hints. Sometimes, Van might have mentioned it in passing during conversations.
Online platforms are a great option too. Amazon, for example, has a vast collection of books and graphic novels. Just search for 'van ryder games graphic novel' on their site, and you should be able to find it if it's available. There are also other online book retailers that could have it.
The falling star in Bowser's Inside Story can be obtained by following a series of steps. You might need to defeat specific enemies, collect certain items, and unlock secret passages. It requires a bit of patience and exploration.
In fanfiction, one way to get along with the voice inside your head could be to listen to it carefully. Maybe it's trying to give you some creative ideas for the story. Just like in some stories where characters learn to communicate with their inner voices and gain insights from them.