Question about Fluid Pressure ( Wen Jiang's second post)

From Daniel Bernoulli's research and reasoning, the Law of Vis Viva conservation was related to fluid pressure and speed. The way I understood the Law of Vis Viva Conservation is this: the total amount of energy in a solid is equal to its height relative to the ground (what we commonly refer to gravitational potential energy) and the mass of the solid multiply by the velocity squared of the solid. And the way I understood Bernoulli's equation is this: the total amount of energy in a body of fluid is equal to its pressure and its speed (which is derived from the fluid's density multiplied by 1/2 velocity squared). I intuitively connected pressure and gravitational potential energy together as stored energy. While I understood how gravitational potential energy was derived from an object's vertical distance from Earth's center, but I can't understand how pressure is created in the first place. Anyone care to give some thoughts?