Hmmh, interesting idea!
For English class a year or two ago I wrote an essay entitled: "Music lyrics: Poetry or rubbish?" Naturally the Mac were included and I mentioned a few other favourite bands and singers as well. My teacher said that what distinguished my essay from others was the fact that I namedropped lots of people and songs that readers would recognise to illustrate my points.
So perhaps it's worthwhile bearing that in mind and considering who your audience is. Stick to a couple of examples and the well-known songs that people will recognise from the radio, so that they'll be able to follow. Going in-depth into the secret meanings of songs they've never heard of or only vaguely know won't keep them engaged!
If it's for a younger audience, or you don't think they'll know the songs or the band well enough, perhaps you could take a broader look at your experience of being a Fleetwood Mac fan -- how you found them, what their music has done for you, special experiences, people you've met as a result, excellent online forums ...
Hope that helps. Good luck, and let us see the finished result!