Picasso once said "It took me four years to paint like Raphael, but a lifetime to paint like a child". I'd say it will take a few lifetimes to earn the ability to see like a child. As a child you always see things as they are, rarely blinded by purpose or meaning. Once you grow up you stop being fascinated by the obvious thingness of all things, the simple facts of movement and color which are astonishing by themselves but too obvious.
Life existed for 3.5 million years without the ability to see. So the thinking among scientists is that life didn't need the ability to see in order to exist. I am hoping it will take me a bit less than that to learn how to see.