There are only a few very important steps to follow and then you are on your way:

(1) Just before the scheduled chat time on March 7th, simply visit http://chat.yahoo.com.  
(2) Look for the "music" link near the top of the page.
(3) Once you are in the music lobby, there will be a sub-room called something like "Hepcat Chat Room."
(4) Be sure that before you go to chat that you have signed up to obtain a Yahoo! ID, which is absolutely FREE
    and only takes a few moments to set up.  
(5) The most important step . . . be there!