The first book in college (as a physics major) I used for Quantum Mechanics was the book by Griffiths.
Introduction to Quantum Mechanics (2nd Edition)
Seems like you can get a paperback copy for under $20, hardcover is a bit more.
You say you have a college-level overview of math/sciences. I’m not sure exactly what that entails. Does it include calculus?
I took the class with Griffiths book in my third year as an undergraduate.
A book that will help you understand the necessary mathematics is,
Mathematical Methods in the Physical Sciences
This is assuming you know some calculus. If you do not know calculus, you should also get a calculus book. There are quite a few options. Also some lessons about calculus on Khan Academy.
You should also know some chemistry. I had only taken a single quarter of chemistry (10 weeks) in college before I took Quantum Mechanics. Later I took a second quarter.
I read through the Griffiths Quantum Mechanics book the summer before taking the class. It’s interesting and you can understand a little by just reading it. But you need to work the problems to understand it better. Having that book could be a first step since then you can know more of what is involved in learning the subject.