Physics of Rockets is a best course for learn about to basics of Rockets.
The course introduces the primary forces affecting rocket flight and how those Forces determine the motion, assuming 1 dimensional motion for now. It challenges the student to think about how the dynamics of flight change during different phases, and to shows how to apply them to falcon 9 ascent, falcon 9 recovery, and fairing recovery, introducing principles behind falcon 9 hoverslam landings and fairing recovery with the simple concepts in Newton's laws, free space rigid body dynamics, and aerodynamics.