Isn't one of your first exercises in learning how to communicate to write a description of how to tie your shoelaces? The point being that it's basically impossible to use text to show that

AS for all those mistakes I make - they are on purpose - to teach you how to deal with them

No product is an island. A product is more than the product. It is a cohesive, integrated set of experiences. Think through all of the stages of a product or service - from initial intentions through final reflections, from first usage to help, service, and maintenance. Make them all work together seamlessly. That's systems thinking.

And to get real work experience, you need a job, and most jobs will require you to have had either real work experience or a graduate degree.

I think a successful company is one where everybody owns the same mission. Out of necessity, we divide ourselves up into discipline groups. But the goal when you are actually doing the work is to somehow forget what discipline group you are in and come together. So in that sense, nobody should own user experience; everybody should own it.

To me, error analysis is the sweet spot for improvement.

User-centered design means working with your users all throughout the project.