301 Redirect Help

I’m looking for help on a 301 redirect I’d like to do, and I haven’t been able to find on the WP forums how to do the specific redirect I’d like to do.

I just migrated to a hosted WP site from Blogger, and I initially set up the permalink structure as /%year%/%monthnum%/%postname%.html so that links that pointed to my Blogger site (which had the same domain as my new WP site) would still work. However, I would like to change to a simpler permalink structure, namely just /%postname%/

How would I set up a redirect that takes into account the .html in the old link structure? This is what I have:

RedirectMatch 301 ^/([0-9]{4})/([0-9]{2})/([^/]+).html$ https://benjermcveigh.com/$3