RE: Capturing Opportunity Close Description
Yes. The opportunity close is an activity so you can't do this as described. However, you can write a report using the report wizard (no custom code) to show this data.
On the wizard, you will need to choose Opportunity for the Primary Entity and Opportunity Close Activities (Opportunity) for the related record type. You can group on an Opportunity field like the Topic, then show the Opportunity Close Description as one of the columns in the report. The report can then be emailed as required.
Hope this helps! Please mark as verified answer if you found this response helpful.