If you can sit around all day long and play guitar, you might give it serious consideration. Fear not: doing so will involve you in the local arts community sooner or later, and if that happens, people will find out you are a barrister, and you will end up on more arts boards than you have time for. JMO.
You need to buy one of those little 19th-c. Parlor guitars first though. Every artsy barrister needs one of those.