A good piece of advice is to avoid experimenting with new add-ons on a production site. Most organizations set up a shadow site of their live server, to be used as a sandbox. Once the installation has been successful, the procedure is re-applied on the production site.
Additionally, it is recommended that you make a complete site backup before installing any third-party software. That way you can roll back in case of a disaster.
To install third-party add-ons, take the followings steps:
READMEfile for details.