Given that there is so little on Apple TV+, you could literally watch everything they have in less than a month... normal binge-style watching that is.
Since their description and often times content don't mesh, it's probably a good idea to just try each one and see if it grabs your attention.
There are a few shows that people watch purely because the subscription is free... that if they had to outright sub to watch it, they'd probably skip it until a couple of seasons have racked up.
That's really the big issue with Apple TV+, the length of the seasons are really short and the subsequent seasons are far apart... so if you're all in to Ted Lasso for example, you could literally sub for one month then skip 6 months to a year before you would need to sub again... and that's watching as the episodes get released.
It's one thing if they have 8 years worth of a show on their service... but when they only have 6 episodes total... well it's a pretty sad service. Disney+ and Netflix and Hulu for example may have exactly the same amount of first run content to share with you, but they also have a back catalog of older content to keep you entertained between the down time. With Apple TV+, it's mostly down time with very little else.