Albert Speer is known as the only man high up in the Nazi hierarchy who seemed to have admitted and apologized for the wrongs he had done. I would suggest that you base your report on that idea.
Speer is perhaps best known for his book Inside the Third Reich. I would start with that as a source. In it, he talks about all of the work he did for Hitler and he gives his observations of the workings of the Nazi hierarchy. Importantly, he argues that he was not really aware of the Holocaust.
I would suggest that you do two things. You might try to discuss why it would be that Speer would be willing to open up about the Nazi era when others didn't. In other words, you might attempt a biography of sorts, trying to account for his actions. Second, you might discuss the degree to which you think he really did open up. There is another book from the mid-80s entitled Albert Speer: The End of a Myth by Matthias Schmidt. It purports to debunk Speer's claims about having been ignorant of the Holocaust.
Perhaps between those two things you could fashion a report of this length.