Honestly, most of the talk about 'Black Clover' is on the manga and anime, so I had to hunt for details on the light novels. From what I pieced together, Volume 1 isn't one continuous story but a collection of side stories set early in the series, around the time Asta and Noelle are still newbie Magic Knights. It's got that classic 'day in the life' feel of a bonus volume – stuff like the Black Bulls trying to cook a meal together (disastrously, obviously), or a mini-mission that shows off character dynamics the main plot sometimes rushes past. It's all very slice-of-life and comedy focused, which is a nice contrast to the constant, high-stakes battles.
These stories really shine a light on the squad's weird family vibe. You get to see how someone like Asta, with zero magic, still manages to motivate or annoy everyone into action. It doesn't advance the main Grimoire or demon plot at all, but if you're already invested in these goofballs, it's like getting extra scenes from your favorite arc. I read a fan translation ages ago, and the one where Gordon tries to make friends by being 'normal' still cracks me up. It's comfort food for fans, not essential lore.