Thank you Shawn ( @shbemo13 ) & Craig ( @craigindaytona ) !
Craig, figure painting, others here who do figures & busts, may have their say, and it may be different. This is just MHO. So, on IMHO one probably has to start by the smallest scales, 1/72 (which at my age now wouldn't be no longer an option to consider, not even working with again, unless I got a ultra good & cool magnifying glass and it was for some reason a must do it... but I did start on 1/72 back in the old days, then moved to 1/48, 1/32, and later a couple of 120mm and 1 full body 200mm; now I'm aiming at larger scale busts, by preference, 1/10, or 1/9, the much larger, such as 1/4 for instance are a big... too big IMO, but I'd only know for a fact after painting one, so it's just my take), they give you the initial kick-up, the lessons, the good & bad, how different techniques work.
But painting a figure, for example one of a Human Being, with flesh colors, then the clothes, uniforms, so there's a large variety of painting choices. For the types of paints for instance, I think nowadays there's a lot of modelers that prefer acrylics, to any other type. Those still using the old enamel paints seem to become rarer. Then you have a kind of renaissance with oils. The old painter's oils, the same, now applied to smaller scales and different kinds of painting materials.
Oils give you a whole new avenue about choice, and tend to enhance your creativity. You can make every possible color with just a few basic colors, then expand, up to your own limits.
I have not yet started painting (with oils, on top of a prime coat of enamel or acrylics) one bust. I do have two on my stash so far, one at the 1/12 scale and one at 1/10 scale. Both people's busts.
I intend to paint both using oils, using probably enamels as a prime coat (but in time I may try some acrylics in the process as well, as I have a few busts more coming soon), then work with oils from there,
Lawrence of Arabia/Peter O'Toole, at 1/12 scale (by FER Miniatures, Spain) :
And Viriato (or in English Viriathus), at 1/10 scale (by RP Models, Portugal; they used computer generated 3D sculpting for at least their more recent figures & busts, Viriathus, both this bust, as well as a full body 75mm scale figure - pics of that version here: https://www.hobbysector.com/en/rpmodels/8414-rpmodels-hrp-75-01-002-viriatus-ancient-world.html , there's some Historical background, regarding Viriato, who he was, what did he do, why is he I believe the older historical hero on Portuguese History, as a matter fact even before the current Portugal even existed - , these and other new releases have been created on a digital sculpting format, that's new technology out there) :
Only under Emperor Augusts (between 63 BC & 19 AD) did the Iberian Peninsula (Portugal & Spain included) became fully "Romanized", including Lusitania.
Now, compare the two busts, size by size, under different lights:
There's a large difference between more traditional 1/12 and more recent 1/10 I guess. I should have one 1/9 on order to compare one of these days.
Cheers!
Dolf