keys

hello all, im wondering where i can find a site with good information about keys. ive been a very ignorant guitar player, and im ready to buckle down and learn all the diffrent keys, chords and scales.

this one.

really, i couldnt figure out how to work it(this site, mainly because i thought the scale had to start at the root note of the scale i.e. g penatonic start at g. i didnt know you could start the g penatonic anywhere)....im kind of computer illeterate.