UI and UX are two different things i'd suggest to check what others are doing so you can develop a taste there are resources like Dribble and many prominent U

UI and UX are two different things i'd suggest to check what others are doing so you can develop a taste there are resources like Dribble and many prominent UI & UX teams have their own blogs (like https://design.google https://design.google) then, learn some CSS, don't waste time on Figma when you can just prototype in dev tools there's also a book which shows good/bad by example: https://www.refactoringui.com/book https://www.refactoringui.com/book