These are really nice PDF notes using the Physics perspective on QM (walk through lots of historical experiments that explain why QM was invented). A good math background would be required to follow the notes, especially linear algebra.

Here is a free chapter from my book on linear algebra that covers quantum mechanics basics from a computer science perspective: https://minireference.com/static/excerpts/noBSLA_quantum_cha... Some useful analogies like SQL SELECT-statements and ADC/DAC converters.

And heres a free chapter from mine that does the Deutsch-Josza algorithm using only a very simple graphical (really string rewriting) set of rules: http://qisforquantum.org/wp-content/uploads/2018/11/PART-I-d...