The lightweight grid plugin is a good option. There has been a recent bug since WP 5.1 where the LGC button wasn’t displaying which is being fixed in the next update which will be released for Alpha testing next week. Shortcodes still work.
We also been developing a new Section Block for the Block Editor. We’re just waiting for a bug in Gutenberg to be fixed that could lead to content lock-in… looks hopeful this is gonna be resolved soon and we hope to add Section Block to an upcoming update.