According to my knowledge, the best and free UI/UX tools are Figma, Adobe XD, and Sketch. If you are planning to learn designing then this is the right time because UI/UX is providing ample opportunities. For that I recommend you to take up this UI UX training course from Intellipaat which help you to master all the required UI/UX tools in a single course.
Before that do check out this free UI/UX complete course video from Intellipaat -
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