Help on how to become a Physicist?

Since a very early age I have been very interested in science and math (more specifically anything with space/astronomy). I have always been intrigued by space and the universe. I have a pion and desire to become a physicist but I am not really sure how I can accomplish this. Currently, I am a freshman in high school and I am taking biology and Algebra 1. This school year is almost over and next year I will be taking Earth Science and Geometry. My mind is a bit over active and most of the time I am thinking. So much that sometimes I find it hard to sleep because I find it hard to clear my mind because I am always thinking about space, time, how the Universe came to be, if there are other dimensions, and many other things. Some of the people that I deeply admire are Michio Kaku and the late Carl Sagan. I want to now what path I should follow and things I should do to achieve my dream. I want to know what cles I need to take in high school and in college/university. Thank you for taking some time to read this.