I did a one year course at the London College which was designed as a skills builder in guitar making for those without a woodwork background.
It was a pretty good course but was always hard to get the personal training and supervision that you'd like.
That was over 20 years ago (1986-7)
I had hoped to go on to do the full higher Diploma course but funds wouldn't allow (i had previously had a grant to study Applied Physics at Middlesex Polytechnic, but jumped ship as I was far too distracted by wanting to make guitars)
So I had to find a workshop that would take me on as a trainee, and was only able to do that as a result of the old JTS (Job training Scheme) paying my way, as no small workshop can afford to pay an unskilled trainee. I wangled that as an alternative to my having to sign on unemployed - it was a new initiative that the Tory Government brought in and I used it to get what i wanted.
So I owe a lot of my training to a guy called neil Macdonald at Neil's Guitar Workshop (later became Nightingale Guitars)
The other major influence on me is a guy called Dan Erlewine who wrote hundreds of columns in Gutar Player magazine and now works with Stewmac.com. I studied his books and videos with the same intensity that many young guys study porn. He taught me so much via books and videos and I still learning from him . Check them out at
www.stewmac.comI later became good friends with him and the other gfuys at Stewmac - nice people!!
Nothing beats the opportunity to apply that learning though and I worked constantly over the years tinkering and rebuilding guitars (driving girlfriends crazy too with all the mess).
Experience and figuring out from first priciples what makes it work right is the best teacher.