Will Star Trek:Discovery be on iTunes?

Wait until all 15 episodes have been released, and then subscribe. If you're ambitious, you might have all 15 episodes watched before the free trial ends. Just a suggestion.

Actually, it's pretty easy. I've subscribed on-and-off for awhile now, and it's literally just a matter of going to your account and unsubscribing (a click of a button). You get access for the rest of the period you've paid for, and after that they stop charging you. Seriously.

 

and for people who think cancelling is hard. I have CBS all access. You can simply go to their website and hit cancel. It isn't hard. In fact, about a week or two ago I did that and I immediately got offered a free month to remain which took me through end of BB so accepted. It is very easy to cancel.