It could be highly significant as it might reveal Sans' past, his experiences, and what has shaped him into the character he is. It may also provide insights into the world he inhabits and his relationships with other characters.
Yes, it could be. If he overcame difficulties as a beginner, his story can inspire others to face their own new challenges. His journey from being a neophyte to someone more experienced can show that growth is possible.
A writer is someone who tells his story. Writers use words to convey their experiences, ideas, and emotions. They can write in various forms such as novels, short stories, or memoirs. Through their writing, they share their unique perspectives and personal narratives with the readers.
I'm not sure without more context. He could be an ordinary person sharing his life experiences, or someone with a particular significance in a certain community or field.
The significance lies in the fact that by telling his story, 21 Savage can connect with his audience on a more personal level. He can talk about his upbringing in difficult circumstances, how he got into music, and the challenges he overcame. This can create a stronger bond between him and his fans, and also attract new listeners who can relate to his story.
In the My Hero Academia fanfiction, Sans might be more outwardly heroic. In his original, he's rather laid - back, but here he'd have to step up to the hero role. So he'd be more proactive in helping others.