My advice (maybe controversial): don't play along with recordings. Choose simple songs that you know and play them from memory. Happy Birthday, the national anthem, Christmas carols, nursery rhymes, Lady GaGa, whatever you have stuck in your head. If you're having trouble finding the notes on the bass, put the bass down and sing the songs first. If you have trouble singing in tune (aka matching pitch) then practice singing along with scales and other simple exercises while you're playing the bass.
Learning to hear a song and learning to play a song are actually two different skills; some players can do this simultaneously, but when you're starting out, it's easier to commit the song to memory first, then learn to play the song from memory, in my opinion.