if you want to have a transparent panel just like mac, you need to search for docker
If you want to force gnome terminal transparent, you can set the terminal windows transparent 1st then start the beryl.
If you want to use beryl, try to 'yum install berylxx xxx xxx' I don't know how to install in fedora since I leave it quite long time. Check with google.
However, before your beryl working well, you must make sure your display driver working well too (nvidia,ati,intel)