Matt, according to me you have made an excellent choise!
That's is the same paints as I work with, and I love those paints!
I don't want to sound rude know, (I don't know how much experience you have with painting other things) but as it is your first fig you should concentrate on putting the right colour at the right place on the fig. First when this is properly done you can start thinking about the shading and highlighting.
How I would paint it? I have actually already painted this fig some years ago, and I think this is a good way. Make subassemblies consisting of the MG, the arms, the helmet, and last the body together with all the equipment and, wichever you think is easiest, with or without the head. Paint these apart and then put the fig together and touch up with paint where needed.
Some more help on painting is easier to give while you have started. Feel free to ask more questions as you progress! I hope some of this have helped you!
:-) 
