Basically, freelancing is a self-employed job. There are a lot of freelancing websites available in the market some of them are fivver, upwork, toptal, and so on. There are many job fields available on that website according to one's interests. Build your profile with strong skills. Then apply for those UI/UX profiles if the recruiter is impressed with your profile then he definitely contacts and you can get a job.
Before that, if you want to master this tool then I recommend you to go for the Intellipaat UI UX design course where help you to become an expert in this field.
If you are interested in learning with Intellipaat before that do check out this free UI/UX complete course video -