Some people can pick up an instrument and learn it in a week and some in a decade and it's not really always down to how much effort you put into it, it can be quite dependent on weather you lose interest quickly and your general aptitude for learning something musical and how you go about learning but picking up something regularly, say an hour a day would undoubtedly be enough to get you playing to a high standard quite quickly weather it take you a year or a month or a week, in two months I'd say at the worst you could play something comfortably if you'd never picked it up before.
|