When you login to your dashboard (See Getting Started), you will see this:
There are many Themes available in FIU MySites. You cannot add themes from WordPress.Org. If you want a particular theme that is not in the list, please contact the UTS Support Center via http://utshelp.fiu.edu or call 305-348-2284 and request the theme you need. If the Theme is found to not have security vulnerabilities or any other issues, it will be made available on the FIU MyWeb dashboard.