I had quit messing with solos for a long time because I had started playing bass and then I just got back into the guitar a few months ago. The hardest one I can play now are Stairway to Heaven(solo isn't hard just the song is so long. It doesn't take me that long to learn how to play a solo its just the style of guitar I'm doing right now. I'm 15 and have been playin for 4-5 years.