I can help you understand the Theory of Evolution. What part of the theory do you not understand? Where do you think the evidence is lacking? What standard of evidence do you require. The "preponderance of evidence," "evidence beyond a reasonable doubt," or "beyond a shadow of a doubt?"
There is no smoking gun. The evidence for the evolution of species is pretty much beyond the shadow of a doubt. The evidence that Homo Sapiens Sapiens evolved from Homo Sapiens who evolved from Homo Erectus, who evolved from Homo Habilis who probably evolved from from Australopithecus, this evidence is beyond a reasonable doubt or at least the preponderance of the evidence. There is not even an accepted consensus theory for the origin of life on Earth.
Tim