Starting/Stopping services is standard systtemd thing and isn't linked to a spcific application.
To start a service, let's take firewalld as example, type:
sudo systemctl start firewalld
To enable a service permanentely so it get started automatically when you boot your computer:
sudo systemctl enable firewalld
If you want more info about this, look for systemd services on the web or simply look at the help or man pages. This is also something standard on *nix systems, you can do this with almost every commands:
man systemctl
systemctl --help
Regarding firewalld usage, there are for sure plenty tutorials on the web, it shouldn't take long to find a good one. Also note a firewalld-applet package is available in the software center. If you don't like the command line, the applet will be a good help!
