Answer
Joining Futur+Yes. Joining Futur+ is entirely optional.
After graduation, you are free to begin offering non-legal ceremonies without joining Futur+.
This includes ceremonies such as:
Futur+ becomes relevant if you want to pursue legally-binding wedding ceremonies or if you want continued formal support, resources, and connection through FuturFaith.
Details about what Futur+ includes are covered in Joining Futur+, which outlines support, resources, and expectations clearly.