MBP Late 2013 Retina - update recommendation request

I’m looking to breathe some life into my Late 2013 MacBook Pro Retina, and have recently learned about OCLP.

I’ve watched a handful of instructional YT videos to get a feel of the process. But before I jump straight in with two feet, I’d love to get some recommendations from the experienced folks here on which MacOS I should update to.

Any feedback appreciated!