Have to dig into Lilypond's

[Alexandre Beneteau]

Hello,

Since I need to customize FiguredBass (and -- dreaming is not expensive 
! -- even add some functionnalities), I must understand Lily better than 
now...

Is anybody among Lilypond gurus in this list will advice me some 
particular documentations to read ? (I've dig in the online manuals, but 
don't really know where to begin : grobs, property, scheme, Engravers, 
etc. are confused in my mind).

Thanks in advance :-)

        Alex.