Best answer by shawnmx
If you want SoundCloud to import your existing media and shownotes, that won't work. You will need to manually upload all of your media to SoundCloud.
If you want to redirect your current podcast RSS feed to a SoundCloud feed, you'll have to do that at the source of the RSS feed. If you're using a Podbean feed, then you'll probably need to contact Podbean support and ask them to redirect that feed to the new feed URL after you've got the new feed set up.