Depending on where you live, there are many clubs that have classes and are relatively inexpensive. I live in San Diego, CA and learned to facet at the San Diego Mineral and Gem Society where I now teach the same. Try a search of some rock clubs in your area and they may be able to help steer you in the right direction. There are also many tutorials on You Tube and books available. Sorry I don’t have any reccomendations on books as I learned pretty much hands on, but I know of many very good facters who have learned much of what they know from books on facteting.