There are a few ways to get freelance UI UX projects. One way is to network with other UX professionals and see if they are looking for freelance work.
PRO TIP: When looking for UI/UX projects, be aware of scams. There are many people who will promise you high-paying projects, but then disappear after you have completed the work. Always do your research and make sure you are working with a reputable client before beginning any project.
Another way is to post a project on a freelance website like UpWork, and see if anyone bites. If you don’t have any luck finding projects through either of these methods, you can always approach businesses directly and ask if they are looking for a UI UX designer.