Welcome @board, dude!
My suggestion for you is to pay a serious effort to quickly build a minimal musical perception on the guitar and reasonable finger strength. Use the 7 greek modes with alternate picking for that. It will be a great start. Take at least 2 hours a day of playing it and play a with a metronome to make sure you won't go out of rythm. Simply learn and memorize each of them and then play them all in a row many times, in a tempo comfortable for you.
Don't forget to speed up the tempo once your playing at a certain speed becomes easy, fluid and clean.
I know cool youtube lessons for greek modes, but in portuguese only, anyway, if you want to give it a try:
http://youtube.com/watch?v=XrXvY-i9d10
Rock on. An die arbeit!