There is no better way to learn more about robots and electronics than building and programming your own. The Robot Nano Hand is an interesting project that involves 3D printing and programming your own AI robot hand. It is powered by the NVIDIA Jetson Nano and has 4 independent fingers plus a partially-opposable thumb.
Each digit can rotate from side to side at the knuckle. The Robot Nano Hand has 11 DOF in total. You can program this robot arm for AI applications. This open source project was created by Rob Knight from therobotstudio.