I don't think we are wired to truly grasp the concept of absolute nothing, any more than we can grasp the concept of eternity.
Infinity is pretty graspable. There have been mathematicians who have tackled the subject intensively. However, you will find that no worthy physicist acknowledges the idea of nothing. This leads us to believe that something was always there and something will always be there.
I don't think you can truly grasp infinity. For one thing, it's impossible to define. Take the following thought experiments:
I have an infinite number of tennis balls. I give you half of them. I still have an infinite number. Infinity/2 = infinity. Infinity = 0.
Simultaneously, I have given you an infinite number of tennis balls and I still have an infinite number. Infinity - infinity = infinity. Infinity = 0.
I have an infinite number of tennis balls. I give you one of them. I still have an infinite number of balls. Infinity - 1 = infinity. Infinity = undefined.
Like pi, you can use infinity in math, but grasping it intellectually is another thing