Ive had no lessons. and leant how to play on my own, and playing is not bad. But on your lessons you well going to the 5 are going to the 3rd and on  7th cord are what ever are  7th cord. if you would could you explain that to me, sorry I just don't understand thanks.

Hi Boyd --- thanks for the question and for being a part of Sonic Junction.  Duke's lesson assume that the student has at least an intermediate level of experience with the guitar.  For questions like these, I would recommend you find a local teacher to work with who could provide you with a solid foundation for playing the guitar and understanding chords, chord progressions and the major / minor pentatonic scales.  Once you have that knowledge, you will be ready for Duke and Corey's lessons.  Feel free to email me directly throught the Contact Us page if you have any further questions.  

Thanks.