guys Im interested in the industry 4.0 content, im still a student. Where should i start? what kind of projects should i do? I've been learning how to use node red, the functions, how to build dashboards, interact with sensors or plcs etc. but what else can i do? because i dont work, and im a liberal arts student, i dont have access to any sort of hardware, also factory io or simulators require money. Any suggestions what should i be working on? like how do i do projects surrounding implementing Unified Namespace?