Can I delete my team and start over...

if I haven't joined a league? If so, how do I do that?

Thanks,
Paul

I found the answer...

Paul

Not sure what you are wanting to do. I think there's a button to clear your draft and start over.

I decided, after starting a mystery set team, that it was not going to be for me. I was able to start a new team in a different set, but I was not able to get my credit back (it was 2 weeks before the current set released and I didn't want another with the old set).