If you want to learn RBD simulations from the ground up, there is no way around the incredible CGMA course by Louis Manjarres:
https://www.vfx.cgmasteracademy.com/c...

Simulations done in Houdini, rendered in Karma XPU
Environment built using Quixel Megascans Assets
Composited in Nuke

PC Specs:
GPU: RTX 3080 10GB
CPU: Ryzen 5900X 12 Core / 24 Threads
RAM: 64GB DDR4 RAM

Rendering took about 25 hours with roughly 3-7 min / frame in Karma XPU (Houdini 20)