Take it one step at a time and don't be afraid to get your feet wet. There are no sharks to bite off your toes
No one woke up one day and knew how to configure Linux, we all had to do some reading and follow some guides, etc. (except maybe people like Leigh, Seve and a few others, who seem to have been born with the smarts)
Banging the head on the wall is part of the learning process
Once you do a few things 'by hand' you'll notice it starts to make more sense.