Well, there is no photo of your penis posted - which is a good thing, because we don't allow photos of genitalia.
Chances are, you won't damage your penis through masturbation. Chafe it, maybe. But not major damage. And masturbation won't affect the size.
You might try masturbating right before a sexual encounter rather than just masturbating "all the time" to try to fix it.
As for your "big question," are you ok? Sure. A little inexperienced and worried is all.