mrsuperkiwi;
Welcome to the forums! Lots of good advice can be found here.
So you want to be a figure painter. Well there are many books that can guide you, however nothing works better than practice. I started out practicing on cheap figures to get the paint skill right on the cheap ones before attempting to paint a costly figure.
In addition to the above two suggested books. You can also look for back issues of Fine Scale that cover figure painting.
Other books you can source out from eBay or the like.
Look for the following publishers
Schiffer Publishing - Type "SCHIFFER" in the search bar
ALMARK - Type "ALMARK" or "ALMARKS" in the search bar
Each of these two publishers have numerous books on various subjects of modelling and figures. Some are long out of print but the lessons contained in their pages is pure gold.
Another source of information is other magazines like FSM
(Sorry to the editors for mentioning these)
Military Modelling - U.K. Publication
Military Modelcraft International - U.K. Publication
Tamiya Model Magazine International - U.S. Publication
Military in Scale - U.K. Publication
And last but not least back to eBay and search for
Military Modeler - U.S. Publication (Out of Print) Type "Military Modeler" in search
Scale Modeler - U.S. Publication (Out of Print) Type "Scale Modeler" in search
These two magazines ran monthly from 1966 - 1998 (Scale Modeler) Military Modeler 1976 - 1994 (Merged with Scale Modeler 1994 - 1998 as one magazine)
The last area you can check is the Internet itself. There are plenty of International Plastic Modellers Society pages with lots of information on figure painting. As well there are private edit and postings on the subject as well.
Also enquire at your local hobby shop and see if there is a club or group of similar minded modellers near you. Sometimes you pick up great help right where you live.
I hope this helps. Best of luck to you. Happy Modelling!
Cheers;
Gregory