I would like to give some standard points to generate RSS feed and these are:
Identify the items for your RSS feed.
Write a list of your items in any word processing application such as Word, WordPad, or TextEdit.
Create an XML file with the necessary tags, which will serve as codes to identify your RSS feed.
Validate that you did everything correctly by uploading your file into a system provided at feedvalidator.
Save the file in XML format.
Submit your RSS feed.
Utilize an online tool to create an RSS feed.