Some of the well known, ( to the lampworking, i.e. beadmaking community) bead makers produce tutorials to help hobbyists like myself improve. Michael Barley's baleen tutorial is here and I bought a copy a few weeks ago. You can see some of the beads I've made following the tutorial, with modifications here.
Early beads start from number 1 with the designation a or b relating to both sides of the same bead.