Star Wars: Andor

Finally got around to watching the finale last night.
What an epic episode to finish off one of the finest written and acted shows I've seen.
I guess the only real question I have; did Andor return to Luthen's ship to actually die--from the grief of what all happened since he left? Or was it to team up and take the rebellion spark to the next level, which is what I presumed?
I am also really curious about his sister and can't possibly believe the writers forgot about this...just seems like it given Andor suddenly had A LOT of stuff going on that he was just seriously waylaid in his quest.