Plot is what happens in your story. Every story needs structure, just as every body needs a skeleton. It is how you 'flesh out and clothe' your structure that makes each story unique.
I write about times and places I would visit in a time machine, like ancient Rome or the Wild West.
Like every child growing up in America, I read 'The Adventures of Tom Sawyer' and 'Huckleberry Finn.' I liked them well enough, but I didn't love them.
I thought it might be fun to set my books in Nevada, which is in the West and still pretty Wild. You can still gamble, carry a loaded pistol, and go into a silver-mine, and they still have saloons with swinging doors, boardwalks, and horses.
Aim to write for an hour per day. I used to be a teacher, and an hour a day before school was all it took for me to write my first book. Don't get discouraged if a holiday or illness interrupts your writing habit. Just start it up again.
At 16, when I was at Henry M. Gunn High School, I had a crush on the English teacher, and my grades improved dramatically. This great school had only 400 students, mostly children of Stanford professors, and it was more usual to have classes under one of the oak trees dotted around the campus than in the classroom.