Here are some excellent ideas from our Twitter community…
Volunteer design UX of restaurant, school, nursing home, or something you’re passionate about and want to do more of. Talk to friends and family, go door to door, and cold call, email, or message. Play Crowdsourcing or document your own personal site UX design.
And then there is this article:
And even better, this: Mini design challenges at https://bitesizeux.com/