Sometimes people get a bit daunted at looking at sheet music or playing along to it. The fun TED-Ed animation below from Tim Hansen is a good way to see the basics without having to delve into too much detail.
After watching through, you could initially practice using a few tunes you know well. Try concentrating on the rhythm first and think about the pitch (ie the notes on the fretboard) later.
If you pick a simple familiar piece and look at the music whilst listening to it, you can follow the notes before even trying to keep up playing. YouTube handily lets you slow the speed right down in the settings feature.