What concers him now is what the witches has said to him in the beginning. They told that you will be grateful for what you get but will not be as happy as his friend (forgot his name). He is worried about his generation not being able to become king after him, since he has no sons that will take after him also what worries him is that he knows he is no the real king and he killed the original king; he knows that sooner or later he will be overtrowned by the dead king's son.
It can be Memoir or Conceptual autobiography It can be Memoir because Memoir means focusing on certain period of time in author's life. It can be Conceptual autobiography as it means <span>when the author does something very different or outrageous and writes about her experience</span>
How about a world wonder? Like, the pyramid of Egypt, the Great Wall of China, or the Statue of Liberty. They are very easy to do and I did something similar in the 6th grade. I hope this can give you ideas. Good luck!