Fuck yeah, go watch Picard S3.
It was a fun ride.
You don't really need to watch the other two seasons first if you don't want to; the only thing you won't have is the backstory on why the hell Picard knows Seven and who Seven's kinda girlfriend is.
It's not even about that.
Like 99% of women have hit menopause by 55, and the number of births for mothers over 50 with no medical intervention in the conception process is extremely low. So low that Wikipedia has an article detailing specific women it's happened to.
https://en.wikipedia.org/wiki/Pregnancy_over_age_50
This wouldn't be a huge deal, except a major plot point is that it was an accidental pregnancy neither of them planned for. So it's not like she was getting any kind of fertility treatment.
While not impossible it just makes Jacks conception extremely unlikely