Personally, I hate it when people say "read up on it". Most of the time it means they don't feel like sharing what they know.
You start with your monitor or tv. Is it high definition? if so, that will indicate what kind of receiver you should have. Your receiver can be a dedicated unit or a board for a computer. The former is easier. Azbox, Sonicview, Coolsat, Vantage, are some of the names for the dedicated units. Technotrend and Prof are a few of the names for the computer boards
You say you have an actuator. Does that mean you have equipment and wires that can drive it? If not there are units like the Gbox or Vbox that will drive it. If you don't have the wire to run the actuator, I and other guys have used a 4 wire lawn sprinkler system cable with good results - sold by the foot at Home Depot. As far as mine is concerned, I put a junction box in near the dish, used wire nuts and went to the actuator with stranded wire.
I don't know your lnbs but guys are mostly using units that control polarity electronically, rather than use additional wires and having issues of a servo that changes polarity from H to V via the little blue motor. Some guys do like the servo because it can give a bigger variety of positions in between H and V. Some voltage controlled units have C and Ku all in one. If the holes in your mesh dish are small enough, you will be able to bring in Ku. If the holes are bigger than a quarter inch you should just go with a c-band lnb. You may have to modify your scalar plate considering the age of your dish.
Hope it helps. I enjoy the hobby and especially enjoy not getting monthly bills. The content is pretty good right now. Sometimes though, it is outstanding.