Like hunter said. It depends on how much you practice and also what's your music background. I don't mean that as playing instruments but as how much music have you listened too in your life. Usually that will make people learn faster since there's already a good chunk of melody, rhythm and feel in the memory. Like Anders said in one of his videos, if you want to be a good blues player, you have to listen to a lot of blues. That and a lot of practice on top :)