Transitioning from teaching face-to-face to online teaching usually takes time, planning and ideally, help from instructional designers.
Depending on faculty experience with course management systems and discussion forums and video conferencing tools, it is not unusual for preparation to take from 20 to 60 hours.
Faculty being directed to move online spontaneously can experience a great deal of stress, anxiety and trepidation. To help with this unanticipated transition, cancelling other types of faculty responsibilities for a few weeks can help.
For getting started, this tip on Ten Best Practices for Teaching Online might be helpful.
Also check out other tips in the Library of eCoaching Tips or the The Online Teaching Survival Guide: Simple and Practical Pedagogical Tips that organizes and updates all the tips. It is also available at Wiley.com.
Post questions here for your specific situation.