It's really quite easy once you get the hang of it, what you should do is instead of trying to play with the Jam Major straight away, you could maybe start transcribing, you may be thinking: 'But i can't and it's hard!' well your right, and wrong, true it is hard but you can I
use these methods and rules:
1- Understand that it won't come to you straight away
2-Tape yourself in a certain key, for exmaple, G Major, tape yourself playing notes from it, finish, name the file G Major (so you know what key it's in), forget about it and go back again and try and play whats on the tape, in other words TRANSCRIBE!!
3- Try not to use tabs
4- Identify what key the solo is in
5- Have as much fun as possible