One of the biggest problems I found with the Modular Degree system was the tracking, or rather the "proof" that you learned something. I always-always encourage people to create content. It helps you distill, define in new ways, and is solid time-stamping of your learning.

Some other great tools some people use are Roam Research or Obsidian, they work like a brain connecting ideas together. The problem is that they aren't the easiest to use/learn, and they have some setting up to do. While they bring ideas together, they don't inherently bring ideas in easily.

we are social creatures by nature. We have only accumulated this much progress as a species by sharing knowledge. Breaking it down for the next generation, Feynman technique or not, there was a passing along of information. In the digital age that should be even quicker.

There are learners around the world on the same topics as you, but there isn't really great communication tools for this. Unless you find a specific discord, or perhaps Twitter community

With the Modular Degree, as well as Glasp.co, there is an inherent peer based social dynamic. Letting you see what other people make public of what they are learning, and for the most part I wouldn't think people would have a reason to make things private.