Were you able to join the Webinar on August 7th? I saw that you were having a bit of difficulty. At the moment, the most recent and comprehensive videos are provided in the Webinar; the existing ones are a bit dated.
Until the next one comes along, I'd be more than happy to help you on the right track with getting in-person training. Where within the region, would be your primary editing area? DC, Maryland or Virginia? This is so that I also know what the appropriate Google Hangout channel to place you in.
Re: Map Editing