This took me awhile to figure out. Basically, anything - website or app - that you think could be improved. I picked an app I use for tracking the international space station. Then I’ve got a list to go down : hair salon appointment app, online grocery shopping app/website, women’s health, elementary school teacher resource sharing website, etc. Literally anything. It can be something that already exists, or one you’ve never seen before. Just pick something and start.
Something I had to push through to get started: my first personal project is going to suck. And I needed to be ok with that. I don’t want it to suck, but after trying the ux process a few times, getting the flow, maybe I’ll come back and redo my first one, see if I can do it better. Just need to get it done.
Best of luck!