How Am I supposed to watch Rick and Morty?

I looked up on google where to watch Rick and Morty and it said it was on prime video, I checked prime and it said I need to have a stack tv subscription to watch it on prime, why the fuck do I have to have 2 subscriptions to watch a show? Why does it say it’s on prime if I actually need a whole other subscription. After that I went on to the App Store to download stacktv but it’s not even an app, how else am I supposed to get a subscription for it? Please help me