It's great to learn major, minor and 7th chords, but this foundational knowledge is just the beginning. If you want to become a better guitarist, you'll need to be comfortable combining various chords together.
Today I've created a video to help with you strumming between A Major and E Major on the guitar. This is a very basic lesson, but I think it can help with your playing, especially if you're a beginner.
Practice along with this video as many times as needed until you feel like you've got it down.
Also, over time, try and have each string played sound clean.
With focused and continued practice, there is no doubt that you'll improve!