Problem with Mapping

This is most definitely a novice problem, but here goes:

I recently transferred my blog joshhatala.wordpress.com to joshhatala.com using www.remarpro.com and Bluehost. I paid $13 to for mapping, which words fine for the main page of my blog. For example, when I Google my name, the old wordpress.com blog appears, I click on the old link and I’m taken to the new blog (joshhatala.com). However, when I Google search for a specific topic on my blog and click on the link that appears, I now get a 404 error message from Bluehost. For example, if I Google search for “french revolution unit”, this is the second link that appears (from my old blog address): https://www.joshhatala.com/teaching/a-unit-plan-for-teaching-the-french-revolution-by-josh-hatala/

It takes me to the error message. This page, however, is visible on the new blog at this new address: https://www.joshhatala.com/?page_id=42

Any suggestions on how to fix this?