I started using the Fiddle for Dummies book then the advanced fiddling book by Craig Duncan. It’s a good fun way to play and still work on advancing my skills. I don’t seem to get old bad thinking habits and tensions triggered as easily with fiddle music as I do with classical music. I enjoy playing fiddle music more but prefer classical or popular music for listening. If I could just play the classical well enough that I enjoyed listening to my own playing!