Ask HN: How do you become a UI/UX Expert?

I have a strong background in graphic design (namely print design) I've started dabbling in web design but my real passion so far has been in UI/UX work. I want to become incredible at this and built up a portfolio enough to get started doing this as a real career. Looking on jobs boards to get a lead on what might be needed to this right it seems most places want 5+ years of experience with it So basically two questions. 1. What sort of projects would be portfolio worthy? 2. What would constitute those 5 years of experience, can I do that on my own without a position? is there a market for freelance UX work? thanks in advance, I really appreciate it. -Mike PS: is there any other advice or recommended reading I should look into?