Quantum physics tricky for two separate reasons.
(i) The mathematical theory (Schrödinger equation, wave function, operators, probabilities) is solid and well-defined, but may feel unintuitive, as you say.
(ii) But quantum mechanics is also an incomplete theory. Even if you learn to be at peace with the unintuitive aspects of the mathematical theory, the measurement problem remains an unsolved problem.
"The Schrödinger equation describes quantum systems but does not describe their measurement."
"Quantum theory offers no dynamical description of the "collapse" of the wave function"
https://en.wikipedia.org/wiki/Wave_function_collapse#The_mea...
