Trying to help move a few communities off reddit. Confused about Kbin vs Lemmy and some of the migration tools.

Hello All,

I'm trying to assist in migrating a few subs over to Kbin/Lemmy, I'm still confused on the difference between Kbin and Lemmy.

Regardless, have been looking into tools to migrate content from the subs, and came across this one https://github.com/rileynull/RedditLemmyImporter

However, the readme assumes readers have knowledge they don't have, so it's for example not clear to me if it's possible to "import" the database created by this tool to an existing lemmy instance or if I would need to create an entirely new instance just to host the content (and then what? can instances be "merged"?)

Thanks for your time in advance.