Two questions: First, which hand does one usually use for what? I've been practicing on a right handed bass, but am left handed, and am wondering if I should go try playing some left handed basses. Do people normally use their more coordinated hand for frets or for picking? Secondly, I notice I tend to play nearly exclusively with my thumb. Is this bad? Is it due to the fact that my right hand is not as coordinated as my left/hasn't learned coordination yet? If so, should I make extra effort to learn to play with at least two of my fingers?