Outlining plot is as important as the writing itself. Without at least jotting down what will happen in your story, it may go on forever, take a weird turn, or just never become complete. Again, I have personal experience with this. I use the platform Wattpad for my writing, and you update by chapter. I had an idea for a book and just started writing. Chapter fourteen was when I met my downfall. I had no clue what I was writing about anymore and was filling the chapters with boring descriptions. I lost my course and had to pull the story, despite its positive reflections.
Any basic plot outline graph can help when organizing a story. I remember using it in my elementary school work, but it can be useful for writers that don't know how to outline stories yet. It contains the exposition, rising action, climax, falling action, and conclusion. It can be helpful for beginners but isn't always what you should use. I suggest using it as a first step and venturing out with it as your base.
I use a timeline to keep track of my story. I draw a quick line and outline each chapter vaguely. To create a quick timeline, draw a line and outline each chapter vaguely. You don't need to include every detail in your outline either. Save the details for the story.
The second way I recommend to outline your story takes space, so if you don't have a wall to use, I suggest skipping this way completely. Find a wall near where you write and grab some sticky notes. Write down main points of your story on them and place them in order on the wall. Methods like this are better for tactile learners, who like to touch things and move them around. It is also easily changeable and cheap.