My preferred FTP/SFTP client is good old Nautilus - GNOME's file manager. Just switch the path mode so you can type in a path in the address bar, and do e.g. sftp://user@hostname/
On my system, Filezilla installs into my Applications->Internet menu. In the future, if you don't know where a package was installed to, run the command `rpm -ql <package>`, for example `rpm -ql filezilla` and see that its main binary is at /usr/bin/filezilla and its menu file is at /usr/share/applications/fedora-filezilla.desktop.
If you do `cat /usr/share/applications/fedora-filezilla.desktop` you can see what categories it's in: Network and FileTransfer. So, it would show up in your GNOME menu in either "Internet", or "Other" (on XFCE it would definitely show up in "Network").