One way is to start with a mystery. For example, a human wakes up in the faerie world with no memory of how they got there. Then, introduce a series of challenges for the main character, whether human or faerie, to overcome. This could be facing a powerful and malevolent faerie who wants to keep the human trapped. Another idea is to have a love story between a faerie and a human, which always adds an element of drama.
To create an engaging plot, think about the goals of your characters. If your main faerie character wants to become the queen of the faerie court, show the obstacles in their path. Maybe there are other faeries who are jealous and try to stop them. You can also add some twists and turns. For instance, a seemingly friendly faerie turns out to be working for an enemy. And don't forget about the setting. Use the magical elements of the faerie world to your advantage. If there's a dangerous forest that changes its paths, make it part of the challenges the characters face.
An engaging plot in faerie novels can be created by building on the relationships between different faerie clans. Suppose there are two clans that have been at odds for centuries. Your story could be about a young faerie who tries to bring peace between them. Along the way, they discover secrets about their past that could either help or hinder their mission. Add some action - like a battle between the faeries using their unique magical powers. And make the stakes high. If the young faerie fails, it could mean the destruction of the entire faerie world or at least a part of it.