On your dashboard, you can click on the main menu item "account" to see all your account settings.
Here's a brief summary of all the account settings options.
Here's where you can update your account's email address and password
Here's where you can opt-in or opt-out of email notifications
Here's where you can upgrade your free fan account to a paid creator account. Switching to a paid account is easy, and all your activity as a fan will still be preserved. You can continue using PodInbox as a fan, even with a creator account.