Organizing submissions to a Repair Cafe, best, or at least good, practices?

[7tronics]

Our team of Light EV (ebike, escooter) advocates is considering starting a Repair Cafe perhaps just after our monthly meeting. We are seeking feedback on ways to organize this.

Is there a suggested meeting management tool aside from a bit clumsy use of online calendars, to allow people to register their interest and need, so we can match that need at the Repair Cafe?

For a virtual Repair Cafe, which we see would mainly be used for diagnosing problems where special tools aren't required, are there software tools that you all would recommend to assist the Repair Cafe tech in working with a person submitting a problem?  We would like to use Help Lightning for instance.