That web page says that “In general, this method of consideration is designed for students who have been unable to meet the regular subject requirements and/or earn a high school diploma because of unique circumstances, such as non-traditional education or long-term illness.”
Since there is no indication that you would be unable to enroll in and complete high school the usual way, it is unlikely that trying this route will be successful the way you are suggesting.
There have been students who started at UC at age more typical of students in middle school. But their profiles do not match what you are trying to do. Example: https://newsroom.ucla.edu/releases/at-just-14-ucla-math-student-moshe-229359