Are there websites that cover basic, intro QM info like operators, wavefunctions, eigen functions, etc and how they all relate to each other? Textbooks are only so-so at explaining this stuff and I haven’t been able to find a really good website on the subject.
You might take a look at the QM page from Hyper-Physics out of Georgia State, although it is not without its quirks (it’s a hypercard stack that has been transmuted into a website) and from your OP it may be a little on the basic side.