The Deathnote comic stands out for its unique concept of a supernatural notebook that grants the power to kill. It also has well-developed characters with their own motivations and agendas. The narrative is full of suspense and mystery.
It depends on your interests. If you are a huge fan of the Deathnote anime or manga and want more of the story, then the light novel is definitely worth it. It gives more backstory to Light and L's relationship, for example. However, if you are not that into the Deathnote concept in general, you might not find it as appealing.
One interesting fanfiction could be about Sakura finding the Death Note. She might initially be confused but then starts to use it in her own way to protect her village. For example, she could use it to eliminate threats from outside forces without fully understanding the moral implications at first.
There are differences in the character development. The light novel may explore certain aspects of the characters, like Ryuk's true nature in more depth. It might also have some additional plot elements that were not included in the anime. For example, there could be more details about how the Deathnote was created in the light novel.
First, understand the basic principles of light and shadow. Then, study how manga artists use different tones and gradients. Pay attention to the direction of the light and the shape of the objects. It's all about experimentation and building your skills over time.
I recommend a novel called South of Qingqiu. It's a fantasy romance novel about ancient myths. Although it's not a manga, it's quite similar to the manga plot you mentioned. The novel was about a healing story. There were all kinds of stupid and cute monsters accompanying her. The female protagonist could see the monsters and inherit the healing ability. I hope you like my recommendation, Mwah ~😗
There were many novels that were adapted into comics such as Douluo Continent, Martial Universe, Battle Frenzy, and so on. The advantage of manga adaptation was that it could better present the plot and characters of the novel, and at the same time, it could provide readers with more entertainment options.