Stories are about change. So something in the life of your MC has to change. There is no need for big drama or problems, but change is what drives a problem.
That change can be the MC moving to a new town and learning about its history and making new friends. The MC learning an instrument or joining a club just for fun. A group of friends where the dynamic changes as they grow up. Whatever.
In most stories, your arc has an inciting incident, followed by a question/problem. But the first solution fails while complications raise the stakes for the MC. At some point, you have an "everything is lost"-moment at which the MC uses the knowledge he learned before to finally arrive at the correct solution.
For SoL-stories, the middle part is often taken out and stakes are dialed to a minimum. It'll be "I can't go to the party" or "I won't have ice" instead of "Everyone will die" or "The love of my life will forever be out of my reach". So you cut out the progressive complications and the "everything is lost"-moment and just go with a more simple "problem with low stakes" - "tries a solution" - (maybe one failed attempt before it works) - "it works".
Depending on the story, those challenges can be as low as "I want to talk to X" or "I need to apologize".
But if you look at a lot of the really successful SoL-stories, you'll still find an overarching story with smaller arcs that build it up. You'll still have challenges or problems. Those will give your story both structure and a better flow. It's just that their topic is rather trivial...