Here are the chord diagrams for a visual reference:
Watch the video below for more instruction:
After watching this video and learning the chord progression, you should continue to rehearse these chords until you don't have to think about the order and finger placement of each chord any longer; this is commonly known as automaticity. Automaticity is defined as the ability to do things without occupying the mind with low level details, allowing it to become an automatic response, pattern, or habit. When you train yourself to remember these chords and the order they are played in, then it will allow your brain to focus on other aspects of the song, like the strum pattern or the lyrics. Automaticity usually comes about after lots of repetition learning and practice,