Until you are supporting yourself with your music, you are only a clerk at Home Depot and a guy in the neighborhood who repairs cars in his home because he can't get a real job as a mechanic.
Woah now, I'm a matridee at a catering hall, I work int he lumber and power tool section (and soon sales division) at Home Depot --- and, I've never aspired to be a mechanic. Not now, now before, not ever. I just do it for friends and locals in my immediate neighborhood for some extra cash --- and I do it well enough for them to come back and recommend to others. I make it pretty clear what I do NOT do (brake lines for instance, since I don't want to be responsible fora break failure, even though brake lines are also relatively easy with a flare tool).
I'd also argue that basic mechanic skills are necessary on Long Island (Suffolk County) where there is no other form of transportation other than your own car. I'm amazed at how many people are willing to pay $30 just to put antifreeze in their car and give them an oil change.