Need help to get started: what material is better for miniatures?

Hi everyone, i've made my first miniature, which is a D&D medium creature miniature (3cm x 2.5cm / 1 inch wide) for a playing character.

I did this using DAS (air dry clay), and it didn't work well for me, as the fine details came out horrifying because DAS is more useful for round shapes and bigger sculptures.

What material can i use for miniatures this small? I see that fimo and polymer clay are the most used but i don't know any brand or commercial name of those products.

Any suggestion would be appreciated.