Form where users can edit their own records

I have several users - not zoho creator users - who each have individual records. I would like to give them access to edit their own data. What is the proper way to do it, and which resources can I draw on to get insight to this facility.

To be more precise - I have signed people up to a conference with workshops, and now I have all my workshops in place, so I would like to send an email to all attendees asking them to choose the workshop they would like to join. I would not want them to go to the report, where they can see and edit all other records.

I have been around exporting records with ID to word/excel but there must be a more direct way in Zoho Creator to make it.

Thanks in advance

Poul