Data migrations (not upgrades)

I work for a non-profit and we have quite a lot of websites.  I get to work with Drupal 9, Drupal 7, Backdrop, and WordPress.  We have a WordPress multisite.  Recently a discussion began about improving one of the WordPress blogs.  I wanted to see if it would work in Backdrop.

Erik Wesselius will share his experiences moving a relatively simple Wordpress website to Backdrop CMS.

If you have any experiences migrating data from Wordpress to Backdrop, please bring them along and share.