Figma is best for designing UI/UX. I think no comparison at moment. I use it on daily basis to build complex SaaS products. If you can use features like components, libraries, auto layout then its gold for designing UI. Try to work on design challenges at the moment. there are plenty ideas like build booking system UI, calender UI , dating app ui etc. you get my point.
When you’re comfortable with it you can look around and find a freelance gig or fulltime jobs.