I want to write a fantasy novel. What preparations do I need to make?

I set the stage for the following article by describing the characters. First of all, the names, skills, grades, weapons and so on of the characters in the novel should not be vulgar. For example, misty rain wins Zhang Si, purple jade furnace wins invincible furnace, and eternal spirit refers to Conan the destroyer. Secondly, we must give people a sense of crisis in some dangerous things and describe them in short sentences. In a tense scene, you should also feel your heart beating faster, so that readers can be there. This is a test of the author's writing style and cultural level. The protagonist must not be invincible as soon as he appears, and he should be upgraded slowly. When defeating some people who are better than the protagonist, there must be some reasons, such as how powerful weapons and skills the protagonist uses. The protagonist must not have a pleasant journey and must be a little tortuous, otherwise readers will easily lose interest. Other characters also need more pen and ink to write well. Everyone should have a soul, otherwise it will be like an empty shell of a walking corpse that people don't want to see at all. In addition, I personally hate those protagonists who don't practice all day and always harm good women. As soon as they appeared, they hung up all the systematic novels for people to read. It was really boring, and there were scenes of slapping faces everywhere. One or two face shots are really good, but they are really speechless. I don't like Yuan Zun's point of view. Zhu Yuangang defeated a villain a few months ago. Playing a villain who is stronger than that villain these days will make everyone say Joo Won is useless. What? Won't Zhu Yuan make progress? I don't even want to read this novel. It is better to have more narrow escape scenes and render more environments. Oh, yes, you should read more novels yourself. Good things can make you learn, and bad things can make you avoid. Write what readers want to see, and readers don't have to write if they don't want to see it. Only in this way can readers have the heart to read and keep the uniqueness of your novel. Don't take everything from others. Maybe you write better than others. The protagonist's character can be cold, but not crazy. The protagonist can be funny, but he can't be brainless. The protagonist can be ruthless, but he can't kill innocent people. The protagonist can be brave, but not reckless. The protagonist can be powerful, but not invincible. The protagonist can make public, but not rude. These are just the basics. If you want to do something, you must stick to it. Even if it is worse, you must write it down. Maybe you will when you write. Well, I wish you success here first. I hope to see your work online as soon as possible (I personally suggest that you write online, although I am not).