just got managed services, what about initial server maintenance?

Hey everyone, just signed up for a managed website services plan after lurking here for a bit. Feeling a bit overwhelmed but excited. My provider says they handle 'everything', which is great, but i'm still trying to grasp what initial steps I should be aware of on my end for proper server management.

Specifically, once they provision the server and get cPanel up, what should I, as a beginner, be looking for or doing to ensure everything's optimal? i'm thinking about basic server maintenance checks. For example, I tried to peek at a log file to see if anything was happening, but it seemed a bit confusing. Is there a simple checklist or some common commands I should learn to verify things are running smoothly without messing anything up?

root@my-new-server:~# tail -f /var/log/apache2/error.log\ntail: cannot open '/var/log/apache2/error.log' for reading: No such file or directory

This is just me poking around, probably in the wrong place. Any guidance would be awesome. Help a brother out please...