A walking bass-line consisting of almost only quarter-notes, with relatively easily memorized vocals, Paul McCartney’s All My Loving is a great song to try out when starting to play the bass and sing. I first started by learning the bass-line and striving to play it without looking at the fretboard. But you will see in the band rehearsal video, old habits die hard! I am still looking at the fretboard!! Not to an extent which it hinders my singing.
What does hinder my singing is that I have to sing very loud (almost shouting) in this rehearsal room, because putting the microphone close to my lips causes feedback. We will try a new rehearsal room soon. We will play over a different PA at the concerts. I think this shall miraculously rectify any remaining problems:-)
This is seriously a very simple song to pull together on the bass while vocalizing. If you find yourself tapping your foot to the original recording, then you already know the tempo and structure of the rhythm of the bass-line. If you can tap your toe to that beat and whistle the melody, then you already have 90% of the music knowledge you need to execute this simple syncopation.
The remaining 10% are needed to memorize the (short) lyrics, to sing the vocals less robotically while your fingers must remain robotic on the quarter-notes. But really, its a song which can be acceptably played and sung from the get-go even for the most adamant guitar strummers:-)