There are too many variations to tell you what system you will fly.
Basically, it is like flying an ILS approach for hours on end
and takes lots of concentration as you are given little leeway for errors (flying off the planned line) as this costs the company money.
Bottom line.................. You need to be shown and trained into the job.
Take music with to keep you sane as it can get long and monotonous.
Watch your F&D times
Take a break inbetween flights if they are long