Lesley,

you can just add a song to any thread that it fits in, but the prefered way here is to take the "Create a new thread" link (on the Forum title page) and choose a very informative title like "ADD: A tail of a whale" and go on typing (using <br> as command for the line breaks). It's as easy as it looks. Then the song (lyrics and/or tune) can be refound by anybody using the Forum Search option (except, e.g. if they look for "a tale of a whale").
As for the Digital tradition database, you will find the song you contributed after one of the two yearly up-dates. This might be at best half a year after the posting but can take even more than two years. We are looking forward to your contributions.

cheers Wolfgang