To start writing general fiction, begin by exploring your interests. If you like mystery, think of a mysterious event or character. Next, create a simple outline. Write down a few key points like the main character's name, their personality traits, and the initial situation. Don't worry too much about grammar or making it perfect at first. The important thing is to get your ideas down on paper. You can always go back and refine it later. Also, read a lot of general fiction to get a feel for different styles and techniques that you can incorporate into your own writing.
First, you need to find your inspiration. It might come from your own experiences, things you've seen, or your imagination. Then, think about the basic structure. Decide on a main character and what their goal or problem is going to be. You don't have to plan every detail in advance, but having a rough idea of the beginning and where you want to go can be helpful.