exitzero said:
Grievous was trained by Dooku.And Finn was trained in hand to hand combat as a stormtrooper. Its not as if you need force powers to use a lightsaber.
I guess if you’re OK just swinging it around clumsily like a baseball bat. Good luck trying to deflect a laser bolt.
https://www.youtube.com/watch?v=xe_cHy4ClrI