Sue,
I have to weigh in on this one. As I am about 3 years into working fairly diligently at making shoes and boots.
Maybe one class to get started is good. You would want it to be something aimed at the complete beginner. Alan Z. has a nice one at
www.shoeschool.com that I took. It gave a lot of background and helped get over the mindset that you need to know all the stuff people post on here to get started.
If that isn't possible. DW's books (
http://www.bootmaker.com/dwswb.htm) will take you from pretty much scratch. Plus if you start with packers, shoes can be just really short boots. Then when you are ready to branch out, Tim's book (Bespoke Shoemaking) is great for making different styles. Having a variety of books is good because each one describes basically the same steps in slightly different ways. Sometimes one book makes no sense until you real it stated differently, then it all comes together.
It takes a couple years to get good at the basics. Think sharpening, skiving, stitching well, gluing, pegging, etc. I practice stitching and skiving/folded edges for an hour each at least twice a week. That is in addition to about 25-30 hours of actually making shoes and lasts. Oh yeah, I have a side business of sharpening, so that gives me 20-50 knives a week to practice sharpening on, too.
My theory on classes is that if you make the attempt before the class, you will have better questions and learn more. Then you need to make a pair of shoes using what you learned within 2 weeks of getting home for the info to stay with you. On the other hand, if you take a class and then need to spend 2 months gathering hard to find tools and supplies you will forget most everything and it will be a waste of most of the time and money.
Just my experiences, yours may be different.
Paul