I bought a bass a few years ago on a whim and to rid the disease was one of the first things i learned along with led zeps dazed and confused. T'was after not playing guitar like instrument for almost eight years....even still, i had the luxury of having some technical ability left (which you did not).
I soon got bored and bought a les paul....the bass is nothing but an ornament these days...i reckon there is no point learning bass unless you seriously intend on being in a band, otherwise it can get rather dull.
good effort though, considering you've never played before.