I owned a MATV company back in the 70's and 80's that installed and maintained exactly what you are trying to accomplish. Then when cable took over we designed and built many miles of CATV plant for cable companies so I know of what I speak.
About all I can say is that you really need a pro to handle this, you are over your head. If all you have is an IT background this is another world to you. You are going to need much more than a basic knowledge and I have never found a resource that will give you much more. Training and experience is the only way to accomplish this.
In addition you are going to need test equipment and tools and know how to use them. Sorry, but I think you will be wasting your employers time and money if you attempt this yourself (or your employer is foolish or cheap to assume this can be done in house by untrained and inexperienced people).
-Hal