How do I install ImageMagick on AWS?
Typically, you'd install imagick with sudo pecl install imagick (you may need ImageMagick-devel and php-devel as well, I think). There are, depending on your repositories, also yum/apt packages that do it for you. if running php 7.2 (YOU SHOULD BE BY NOW!)
How do I enable ImageMagick?
To enable Imagick on your hosting account, go to your Site Tools > Site > File Manager. Go to your public_html folder and create a new file and type php. ini in the Name field. and save the file.