Good effort for some first attempts. Nothing I have ever tried, but looks a bit too "perfect" in the rounded areas, so they look more "c" than "s" (flames licking).
The marker on the left the centre part looks really good, has that nice "flame licking" look. Keep it up, you are very close (and have inspired me to try myself) :o)
On the armour plates at least, the flames look a bit pastel in their colouring. Needs more intensity in the yellows and reds. A glaze airbrushed on perhaps?