The only advice I can give you is - as a server admin, you should at least familiarize yourself with the use of SSH to login to the server as 'root' to be able to do certain administrative tasks, and you should have some basic knowledge about the OS and certain software packages (Apache, mySQL, PHP).
Basic editing of Apache files is not that difficult, kind of like using MSDos to edit a batch file.
I know other panels such as ensim and cPanel/WHM have many 'bells and whistles' for doing tweaks to the server, but Plesk is not currently up to that level of spit and polish. Maybe some day....