> Ok but I need a job to live.

Not really, you need cooperation with other people in this complex world to live. No necessarily a job. You could be self-employed or a member of a cooperative or an elected official.

But yeah, the capitalist default is to have a job, sure.

> And if I want to do something interesting I need the skills and knowledge which are learned at a college level.

Not really, no. You need the skills and knowledge and for some professions you do need the official certificate of education and for a subset of those that's actually warranted, because you cannot get your hands on the training other ways. Doctors kinda need the official system, self-taught appendectomy would not be ideal. English literature? Not so much.