@_elena @stereo A few more things you can check off your list:
* YunoHost sets firewall rules. You can check the rules in the web interface under "Tools -> Firewall". By default, only the ports that YunoHost needs are accessible.
* YunoHost shows all available updates under "System Update". You can and should install them as soon as possible as there is no risk of breaking anything. Most updates do not require a reboot, but you can do this under "Tools -> Shutdown/Reboot".
YunoHost is great 🙂