I want to continue being an Apple subscriber …
Oh, that makes a difference.
The Apple TV+ subscription is for all of the Apple TV+ content, both series that you like and series that you do not like.
There is no subscription for any specific series. If you want to watch Ted Lasso, but not City On Fire, then you get access to both anyway, as both are part of Apple TV+. It is a subscription service, flat fee. It doesn’t matter which shows you watch or not.
When you are a subscriber, then you wouldn’t see “watch premieres for free” anymore.