Sorry, reading manga for free without proper authorization is illegal and unethical. You should support the creators by using legal and paid platforms.
Honestly, there aren't many legitimate places to read it for free. It's best to support the authors by subscribing to authorized services that have the manga available.
It depends on your reading level and familiarity with the genre. If you're used to fantasy and shounen - style stories, it may not be too difficult. The language is generally accessible.
One great 'Black Clover Asta and Mimosa Fanfiction' is 'Asta's Unseen Bond with Mimosa'. It beautifully explores their relationship in a way that stays true to their characters. The story shows how Asta's determination and Mimosa's gentle nature complement each other.
There are also some legitimate reading apps such as Google Play Books. They may offer the Black Clover novel for you to read. Just make sure to check the availability in your region.
The Black Clover manga can be accessed on various online manga reading platforms. For instance, Webtoons or Crunchyroll Manga often have it. Just make sure to choose a reliable source for the best reading.
I'm not entirely sure if it's a popular genre. Fanfiction can cover a vast range of themes, and while there may be some works with such themes, it might not be mainstream. The Black Clover fanfiction community has a lot of different types of stories, from adventure and friendship to power - up scenarios.