Adapting a session to an online environment will take longer than preparing for an in-person session, whether it's a new or repeat class. Keep this in mind when communicating with instructors, and be honest about the work this entails to avoid overloading yourself. In lieu of formal instruction, small group consultations, digital handshakes and tutorial videos can be as effective as a synchronous remote session. See Synchronous & Asynchronous Teaching for additional information.
Asking questions about the proposed class session is the first step to creating an enriching online learning experience. In addition to the typical questions about the purpose of the session and learning outcomes, consider how the online format affects the session.