An instructor could offer a trial session followed by a block of classes. The form would ask about experience, available materials and preferred dates. Trials and full registrations would have separate statuses. Attendance tracking and a materials reminder would help prepare each meeting without accidentally changing the number of confirmed places in the group.
An illustrative example to adapt to your business. It does not represent a completed project in this municipality.
Does a trial reserve the full programme?
Explain this before submission. An invitation to continue can follow the trial, but a programme place should be confirmed according to the arrangements stated by the instructor.
How should a venue change be communicated?
Update the affected session and send directions to registered participants. Include the full address in each reminder so an older message does not send someone to the wrong place.