For specific setups like setting objects on fire, there are more templates coming. To set a primitive on fire, you’ll then add a Flames template and drag the Voxelize tag from the template’s object to the primitive. I have demoed a similar workflow with the Explosion template here.
I’m also planning on a more comprehensive walk through of the simulation setup to explain how to create a simulation from scratch without templates. This aims to serve a deeper understanding for advanced setups. In practice you’ll probably still start with one of the templates in most cases, simply because it saves clicks and time.