You can try to find it in some official e - book platforms like Amazon Kindle. They often have a wide range of light novels available for purchase and reading.
Since I don't have in - depth knowledge of this particular light novel, it's hard to say for sure. However, if we look at common themes in light novels with a similar title, it could be about a character's personal growth on the road to the kingdom. This growth could be physical, in terms of becoming stronger in combat or skills, and also mental, like learning about loyalty, friendship, and sacrifice. There could be a diverse cast of characters, each with their own motives and backstories, all intertwined in the grand story of the journey to the kingdom.
It depends on your familiarity with the genre and your language skills. If you are used to reading light novels and are proficient in the language it is written in, it may not be difficult.