>>11114016thin your paints (50/50 water and alcohol applied to paint until creamy) and use quality paints. Citadel, P3, Army Painter, Vallejo, etc. No tamiya or craft paints.
Basic as fuck advice and you can pretty much do anything you want just from this.
You can use cheap brushes if you want, but can upgrade to quality hair brushes if you start wanting paint to flow better from brush to surface.
Priming the toy's surface ensures paint doesn't just start flaking off and makes it easier to switch the base color to any color you want.
A clear coat (spray) also protects the surface from paint rubbing off and flakes, but not as much as priming. IT also gives your toy a matte, satin or gloss finish.
You should invest in washes. There's Nuln Oil. Quick Shade from ARmy Painter. Or you can use any brown/black paint, heavily watered down with water/alcohol for the same shit. A wash can be any color you want and the easiest shit you can do to make your work look better. IT's so good it can even be applied to bare plastic and make a toy look 4x better looking with next to no effort.
There's more complex washes with enamel and oil, but why bother with something more complex when you can get good results with just acrylics?