[beau_g]

Highly recommend Design of Everyday Things by Don Norman.

[andrei_says_]

Some other recommendations:

Don’t Make me Think and Rocket Surgery Made Easy by Steve Krug

https://builtformars.com/ UX case studies

https://www.nngroup.com/ UX analyses and articles

Coursera has some UX courses you can audit for free

[codeptualize]

Seconded. This is a great starting point.