That's how I learned mine was from Youtube. Watched a few videos until I was confident enough to do it. I let the dealer do it the first couple of years and now I have done it on my own the last two years. Not hard at all and feels good. Thank goodness for Youtube. You can find just about anything out there you need to do, lol.
I went to the store and bought a water line that goes from the water tank of a toilet to the wall. That screws right on to the water pump. Get all of the water out of the system first. Drain the water filter and remove the filer if you have one. Then attach the waterline to the water pump and stick the water line in the antifreeze solution and turn on each faucet until they are pink. Don't forget the outside shower if you have one. I do not have a toilet so I don't have to mess with that. Pretty easy.
Mine is going into storage this weekend. Was hoping to squeeze one more trip in since the temps are staying so nice, but schedule just isn't going to allow.
FYI, get two gallons of stuff to be on the safe side. Its cheap