1. Reading: This is the most cost-efficient way to learn. I keep a bookshelf of thrift-store and garage sale books on hand, along with some used Amazon textbooks for more serious study. My Kindle is
loaded with public domain books, and of course there is the internet.
2. Video: If a book won't cut it, you can also buy a DVD. My preferred method of video-learning is
Youtube, because it's free and there are SO many topics to choose from. Unprofessional maybe, but uploaded by people who have done it before and have some experience. I don't care if someone has a degree, I just want to learn how to do it.
3. Instructors: Part of being self-taught is knowing how and where to find teachers. Most of my "teachers" are authors, as I'm a bookworm, but I've also taken classes or had lessons for some things. For example, I tried learning cake decorating with a book but just didn't 'get' it. Taking a basic Wilton class was just what I
needed. You can also attend seminars or conferences for a more broad in-person learning experience. Keep in mind though, that tutors tend to be expensive. Make the best of your time with them- know what you want to
learn and ask lots of questions.
Good luck! Learning is something many people forget about after high school or college, so you've got a leg up if you keep at it.