definitely an instructor is the way to go. i learned so much more in the year and a half when i started with an instructor than the remainin year and a half without one. i think i9 might try getin lessons again. ( i stopped when i went to uni). personally i would recomend a jazz guitarest to teach you, as long as he does all styles as well. cos if he understands jazz he will understand most stuff.

as or a blueser i assume u dont want to shred or sweep particularly so theres no need gettina teacher who specialises at technique like a metal teacher.