I'm sure this has been asked a lot though I'm having lots of trouble. I've transcribed several solos as well as taking what I liked from them and putting things in all twelve keys. Whenever I have someone explain things to me about chord changes I just don't understand. I can read the notation and spell out the corresponding chords though when it comes time to play something over them I just don't know what to do. What should I be working on to get better at this?