World of Weird Al Yankovic

Hey everyone. I'm working on a polka medley, I've got the music all planned out, which songs and the transitions worked out, the only problem is I don't have the musical/accordion skills to make this thing work. Might someone be able to offer a hand/give suggestions. I don't want to share what's in it on here, because it's fun enough that I want most people to hear the posted version as opposed to make guesses as to what it sounds like.

Not to sound rude, but how to you have "the music all planned out" when you also claim to have no musical ability? You need to actually have proper chord structure and transitions laid out.