It mainly depends on how much you want to learn, how you want to learn and how your learning ability is. If you just want to learn to play because of your interest, you only need to learn the basic operation of UI design software, and the basic operation usually takes about 1-2 months.

But if you want to be an excellent UI designer, you must be familiar with the software operation of UI design. Although software operation is the basic skill of UI design, the proficiency of software operation is equally important for an excellent UI designer. It takes a little more time in this respect. Generally, it will take about 2-3 months longer than the time you just want to know about the software operation.