The Help menu in Airtime offers a 'quick start' guide for new users.
You can visit the Airtime online support forum, and sign up for the mailing list, at http://forum.sourcefabric.org/index.php/f/14/
This forum is mirrored by the mailing list, so posts on the forum appear on the mailing list and vice versa. You can therefore also post a message there by emailing firstname.lastname@example.org
To subscribe to forum updates via mail, please register or login to the forum by clicking the appropriate link. Then click the 'Subscribe' button at the top of each forum page.
Airtime needs your input to improve. If you think you've found a bug, please visit http://dev.sourcefabric.org/ and sign in, using the same login and password that you registered for the Airtime forum. Create a bug report by selecting Create Issue, then Airtime, and then Bug. That way, the Airtime team can keep track of your problem and notify you when it has been fixed. You can also suggest improvements and new features for Airtime on that site.
Finally, when all other avenues have been exhausted, email us directly at email@example.com and we'll try to help!
The UNESCO wiki Community Radio - A user's guide to the technology: http://cr-userguide.web4all.in/ features a very comprehensive guide to setting up a community radio station. This guide is aimed at people thinking about setting up a radio station in India, but includes lots of practical advice that would be useful in any country.