On behalf of the Society of Indexers I am the originator of and tutor for several online workshops.
For indexers at all levels:
How to edit an index: creating order out of chaos: newly revised and updated
Writing index entries: finding the words: newly revised and updated
Indexing the past: new for 2021
For editors:
The Society of Indexers offers other online workshops too: click here for details.
Ann Hudson indexing 