First of all, high school mathematics is divided into arts and sciences, depending on whether you study liberal arts mathematics or science mathematics. Liberal arts mathematics is relatively simpler than science, but because you have no foundation, it is more difficult to learn it in one month. It is impossible for others to learn high school mathematics in three years and you want to learn it all in one month, but you can try to learn from the most basic set first. I'm a liberal arts major. You can ask me any questions you can't ask.