There is no minimum commitment, obligation, or cancellation fee for the Fujifilm X Membership.
You can cancel the membership at any time under your Account settings and then go to Billing, where you can manage your subscriptions and credit card information.
Even if you have a coupon code for a free month of the membership after purchasing another course, you can cancel at any time during that free month without incurring any other charges at all. Access will expire at the end of the 30-day period.
I hope you can see the value in being a member, but we're not going to penalize you for checking it out :)