Not Highly Educated

I believe that the speaker in the poem Mother to Son by Langston Hughes is a person who isn't so educated. I picture them being from the south and speaking with a matching accent. He seems sort of nice but a little depressing and sad. He keeps using weird comparisons like a splintered staircase which confuses me somewhat. It's a metaphor for how his life hasn't been easy like other peoples. The reason I think he's uneducated is because he used the word ain't instead of hasn't.