so im sure some of you are probably like 'how can you be new to this stuff and not new to guitar"? well, ive honestly been fiddling around with the guitar for 12 years and just now decided its about time to take it serious. for the past week or so ive been looking for scales to learn. i didn't realize the different keys and modes and all that other stuff. what is the best scale to learn and what key is it in?