One exercise that I found helpful as a beginner is to take a random word or sentence and find the letters A, B, C, D, E, F or G. Just ignore the rest of the letters, since they are not needed for this exercise. Practice playing the major chords in the order they appear. For example, if I used "I wonder who is reading this blog?", I would play D Major, E Major , E Major, A Major, D Major, B Major and G Major. I like to strum each chord slowly four times before switching to the next chord. This exercise will help you to form muscle memory as you become more comfortable changing chords. With practice, switching between chords will become automatic for you. You can practice this exercise with almost anything around you that contains letters from the alphabet (websites, e-mail, newspapers, books, etc.)
Keep practicing and remember to have fun! Eventually, you can use these skills to play songs you enjoy hearing. It's also a great feeling to be able create your own songs using this knowledge!
Do you have other exercises you use to practice the major chords? Leave a comment and let us know!