I know it's a piano forum smile BUT I also know that we musicians are a diverse bunch! I have a guitar/drummer friend that is interested in learning violin, tending towards "fiddle". Is there anyone here that can suggest a forum or book for him to use? He's not interested in a formal education or a teacher. Thank you so much!
NOT "Richard Amoroso" (in Tyrone's link) --- He's classical violin - also a good artist and I think good teacher. Darol has been doing this for 11 years. The amount of material at your friend's disposal alone is phenomenal.
I registered there in 2016 but was not ready to return to violin with the load I had with my piano things. I reregistered this December for a year subscription. You get a top teacher and top musician, and within your desired genre, all angles. I can't say enough good. Also look him up otherwise - look up Turtle Island as well.
Feel free to contact me in PM.