Sorry, I was referring to books that I own, that make up my own library. I know what you're going through with a very small town library - and a smaller budget. A really great alternative is right here, where you're at. In addition, one of the members, Knothead, has a website that is about as good as it gets for learning things. I'm no good at all with writing up tutorials, even though I'll sit for hours teaching someone.
Yes, practice is the key, but you need to know what to practice on too. After 50 years, I still have a 3' piece of rope that I will take with me if I expect to be waiting for something - doctor, car repair, etc. You can't possibly remember all of the knots and fancywork that are in the many books out there. What works for me - I figure out what I'm going to be tying, braiding or weaving, along with what materials I'm gonna need for a particular project. I then grab the pertinent book (in your case - find it here or on Knothead's site) and start tying it with rope. Once I've got it figured out, I take that rope with me - and tie those knots, etc at every opportunity. By the time you're ready to start your project, you are fully prepared.
Good luck and never hesitate to ask questions. This forum is the best there is.