https://m.youtube.com/watch?v=jsWlROBJ0l0try drawing in ancient methods and doing icon paintings
i gave it a try, it didnt turn out good at first but because it takes a layered approach you can just paint over errors
this is my first icon but it has a lot of issues
the blue headress looks weird if you look closely, i cant paint a halo over the gold leaf, the paint was too thick when i did it and that caused it to look weird, i cant paint even lines, and little air bubbles left small holes on the surface of the paint
i was also just lucky to have so many pigments available but you can start simple, like with black brown and white and maybe red to give a slight pink tone
i can also do book of kells style calligraphy, its more monotonous than a skill thing though