I admit that my knowledge of philosophy is very limited; not advanced, yet it is

I admit that my knowledge of philosophy is very limited; not advanced, yet it is my overall second favorite subject after science. If one accepts the proposition, "I do not know anything with absolute certainty," then is it actually self-refuting or logically contradictory? The reason, is that, if one accepts it, then one must know something with absolute certainty, which is the proposition itself. Therefore, one knows with absolute certainty that one does not know anything with absolute certainty. However, it seems to become infinitely (pun intended) problematic if one thinks about it deeply enough. For instance, if one knows with absolute certainty that one does not know anything with absolute certainty, then one must also know with absolute certainty that one knows with absolute certainty that one does not know anything with absolute certainty. I think that one knows where I am going with this. It could be extended ad infinitum. If one, however, accepts that one does not know with absolute certainty that one does not know anything with absolute certainty, is it still self-refuting or contradictory. How would the most radical skeptics reply to the above? I hope that this makes sense, because it does not to me.

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