I don’t think the goal of OPs proposal is to learn any particular skill. To me it mostly looks like trying to build a tightly-knit group so that each member can use the others as external motivators and close friends to discuss life plans and ideas in detail not really possible between modern colleagues and friends. I.e. the goal is not learning a skill, it’s building a mutual support group that actually works.
I don’t think the goal of OPs proposal is to learn any particular skill. To me it mostly looks like trying to build a tightly-knit group so that each member can use the others as external motivators and close friends to discuss life plans and ideas in detail not really possible between modern colleagues and friends. I.e. the goal is not learning a skill, it’s building a mutual support group that actually works.