Merk Vilson is a big-time Cinema 4D enthusiast. His Patreon site has dozens of great C4D tutorials he makes available for free. We like this tutorial because it's relatively short and provides a neat way to create fire using a procedural approach. Highly recommended!
Be sure to visit Merk's Patreon site.
Find out more about Cinema 4D R20 here: https://www.maxon.net/en/products/new-in-release-20/overview/