[1] User Interface Design & Implementation (start by having a look at the readings; includes exercises and projects; have a look at the dozens of detailed examples of the latter to see the process that is taught here [9]).
[2] Software Studio (this one sets UI/UX design, at the end, with excellent videos [3,4], in the context of app design, not in isolation, as an extension to conceptual design [5,6], without which it is claimed that you can't get it right, and for which you need abstract data design [7,8]; very good assignments and project)
[1] http://web.mit.edu/6.813/www/sp18/
[2] https://stellar.mit.edu/S/course/6/fa18/6.170/materials.html
[3] https://drive.google.com/file/d/1qblmdoZIJQ4rYGgCPLNusEn2yWi...
[4] https://drive.google.com/file/d/1Cvco6r8a6oV3Sy89RKdIfrZCrGi...
[5] https://drive.google.com/file/d/1lzAbrqk9LNLhGMLbsTuVgAm6p9_...
[6] https://drive.google.com/file/d/1AZ85ui0k2QpCKgfJZXUPSk-jdSi...
[7] https://drive.google.com/file/d/1axvYX7kSWAmxDU451hyCcG-wt88...
[8] https://drive.google.com/file/d/1ET9UkOCE-l0c-FR_2w0TFudCAn8...
[9] https://docs.google.com/document/u/0/d/1KIIOS3W9vF4RT0PdX6cH...