SiriusXM is like Cable TV for your ears.
More channels than you will ever want to listen to, but you are paying for
all of them.
Depends on your listening habits and time spent in your vehicle.
If you listen mostly to music, I would say there are other sources, e.g., Spotify, Apple Music, etc..
You can play most any source of music from your phone via Apple CarPlay/Android Auto.
If you want news, talk, sports, etc., then perhaps SiriusXM would be a good value for you.
If you bought the car from a dealer, you might wrangle a free 3 month trial subscription from them. That would give you plenty of time to "test drive" it.
Just my 2 centavos.
Enjoy your new ride.