Here is the caveat - you have to learn and be interested with it.
If you just want to do the minimum to run the app, it will make you worse and usually utterly terrible sysadmin, as it usually is going to be "do the minimum required amount of copy-pasting from tutorials to make the stuff running".
Then inevitably don't update shit, nor even set unattended-upgrades package.
And if the server won't get hacked from bad firewall and no updates, the server will ran out of space because dev of course didn't thought about data management and some log file in wrong place without rotation overflowed.
That's from decade+ of fixing shit of developers that think that tutorial on internet made them sysadmin.
If you just want to do the minimum to run the app, it will make you worse and usually utterly terrible sysadmin, as it usually is going to be "do the minimum required amount of copy-pasting from tutorials to make the stuff running".
Then inevitably don't update shit, nor even set unattended-upgrades package.
And if the server won't get hacked from bad firewall and no updates, the server will ran out of space because dev of course didn't thought about data management and some log file in wrong place without rotation overflowed.
That's from decade+ of fixing shit of developers that think that tutorial on internet made them sysadmin.