Not sure whether you want to use EndNote or RefWorks? Briefly,
RefWorks is a cloud-based system. You will not need to download any software -- you'll simply log in wherever you have a browser. You will be required to download and install the Write-and-Cite plugin for use with MS Word. RefWorks is typically recommended for undergraduates and postgraduates taking coursework degrees. It is straightforward to use, particularly for beginners.
EndNote is client-based, meaning you download and set up the program on a computer. It has a cloud-back up space, called EndNote Online or EndNote Web, which allows you to sync your references. You'll also use a MS Word plugin file. EndNote is more complex and has a longer learning curve to master. It's typically been popular in the sciences and some social sciences, such as psychology..
There are many other citation managers. Most have free usage with a paid tier for either more storage or more features. UGA Libraries does not support managers besides EndNote and RefWorks. We provide training appointments, classes, and access the publisher support teams. Please see: Wikipedia: Comparison of Reference Management Software for more on the functionalities of citation managers.
You may also want to watch the video below which shows the basics of citation managers.