I finished watching Star Wars: Andor yesterday. That is a good show.
Andor portrays the events of Cassian Andor that lead up to Rogue One: A Star Wars Story. I wasn't sure if I would like a story about Cassian, but I did. If you want more lead-up content to Rogue One, read Catalyst: A Rogue One Novel.
If you watch this series, make sure you stick around for the post-credit scene in the finale. It's probably not integral to the story, but it adds a bit extra.