The recording of this song is played using a nylon string or classical guitar, so if you want to get that specific tone, then you have to use that kind of guitar. Other than that, it’s a good song to learn basic guitar fingerpicking patterns and movable barre chord shapes up and down the neck. Practice first at a slow tempo and strive to get every note to ring out clearly when fingerpicking. Most importantly, listen to the recording and try to play along.
The best way to learn this song is by listening to the recording, playing along, and trying to get the rhythm locked in. Once you get comfortable with the finger positions on the left hand just keep that right hand moving, keep the right hand going, don’t break the rhythm! Other than that, use a clean tone, have fun, and keep jammin!
The strumming pattern for “One Love” is a basic downstroke on the offbeat which is explained in detail in my video lesson “How to play reggae riddims”. This song sounds great on acoustic guitar, and if your are using electric guitar then use a clean tone for your amp settings and make sure your right hand attack is short and crisp. The barre chord shapes I have suggested are all in one position for smoother voice leading and so you won’t have to go up and down the neck.