I've never had 100% self sufficiency as a goal, since I don't think it's attainable. But self reliance certainly is. And having a certain measure of self sufficiency should be attainable for most people.
Beekeeping is my latest new skillset. Most of the things I am doing skill wise right now are just further learning of things I already had some level of knowledge in. Motor mechanics, 3d design, and various homestead activities etc.
My list of to do next is long, but all in good time hopefully.