Well dude you cant see apple in an orange tree.. Everythin is inside yourself, u cant wait to become a better guitarist, it's inside you, you should have the thirst of learning.
to find a scale of a song it's not that much hard. Very basic step is finding the landing note. For example "thendralae thendralae" from the movie kadhal desam, this song's landing note is D. Landing note means the song's base note and wherever the song starts it ends in a particular note. So once you got the landing note next you gotta find whether it's major scale or minor scale. The above song i mentioned is D Major. Have you heard the song ilayanila? The landing note is C and the scale is C Minor. Hope you understood a bit :-)
Life is one big road with lots of signs. So when you riding through the ruts, don't complicate your mind. Flee from hate, mischief and jealousy. Don't bury your thoughts, put your vision to reality . Wake Up and Live! -----Bob Marley