Airglider, welcome to the board and congrats on the new ride. Changing the coolant is fairly straight forward but it is helpful to know a little about disassembling the wing.
A member here, Fred H., has an entertainment video series (18 DVDs I think) that walks through most if not all of the stuff you'll likely need to do.
You can get the videos here:
Also, where about are you located? Knowing that a member might step forward and offer assistance.
There is also information here: http://www.pbase.com/fredharmon/coolant
courtesy of Fred H., as well, that will be helpful.