Your vision and self-motivation are admirable. Conservatory would be good for somebody like you. You could also look into taking private lessons with somebody on the guitar faculty at the conservatory. They would probably be more consistent than somebody who is not professionally involved in academia. May I also suggest writing your own compositions and arrangements? Take some piano music and find a way to play it on guitar. It would be awesome to hear some of Bartók's Mikrokosmos arranged for one or two guitars.
Mikrokosmos, Sz.107 (Bartók, Béla) - IMSLP/Petrucci Music Library: Free Public Domain Sheet Music
If you haven't done much composition or theory, I recommend the following (in no particular order):
musictheory.net
http://academic.udayton.edu/tobyrush...f/complete.pdf
http://monoskop.org/images/d/da/Scho...ion_no_OCR.pdf
https://docs.google.com/file/d/0B1ID...3MGNkNzEx/edit
Try to find music that you want to perform, as well. I had an awful piano teacher who did nothing to motivate me and I didn't make any improvement until I picked the pieces that I wanted to work on and ditched his. A year of my life wasted...
Some stuff that's a bit out there:
Jacques Hétu - Suite, Op.41
Claude Vivier - Pour Guitare
Tōru Takemitsu - Toward The Sea
Helmut Lachenmann - Salut für Caudwell