How to submit the podcast to iTunes?
First, you need to get the rss link for your podcast. After logged in, go to the main page, and click on the share button of your desired podcast. Then, you will see your RSS feed from the pop up.
To submit the feed to iTunes, please simply click here from your computer, and iTunes will take you to the podcast submission page. Then just paste in your RSS feed and hit continue.
How to change description or publish date of an epsiode?
After logged in, go to the main page, and click on the edit button of your desired podcast. Then, the edit screen will show the details of the podcast, then scroll down, you will find the list of episodes as shown. Then click on the edit button of the desired episode.
On the episode edit screen, you can edit description and publish date for the episode. Note that changing the publish date will change the order of the episode.