The first time you shoot a basket, you wil probably miss. The 10th time you shoot a basketball you will probably be better.
Podcasting is not different. Just becuase you know that you will back from your 10th podcast and say, “yuck” when you listen to your first podcast doesn't mean you shouldn't record a podcast. You NEED to start a podcast, and all you can do is make it the best first impression you can.
Don't be one of these people who are constantly planning their podcast. Planning is important ( see www.planningyourpodcast.com ), but at some point you need to let people hear/view it.
My advice is to record a few test episodes, and let people voice their opinion. Then let it fly. The key is you've made a podcast and you've published it. Some people won't get that far because they get hung up on making it “perfect.”