How do I start?
Using Jamroom
Yeah - What Strumelia said!!
If you have a Ning archive, then import it as per our docs. You'll then have your Ning members, blogs, videos, photos etc. to play with and to get your Jamroom site looking good.
When that is done and you're ready to go live, get the latest Ning archive, import that, then send the emails (not forgetting to shut down your Ning site, of course

).
https://www.jamroom.net/ning-to-jamroom/documentation/ning2jamroom