The speaker had a specific identity. He was A.H.'s friend and this was the way he mourned him. No one else mourned him with those words. No one else shared the same experiences with A.H. The I may be known to the reader but that doesn't matter. The I is expressing his personal grief in his poems.
Start with the main topic and then break into sub categories
Ex:
Subject : cat meme
Sub: how did cat meme start
Sub: what are cat meme
Sub: how to make your own cat meme
Conclusion and thesis
By supporting their evidence or giving citations
