Hi,
Its very easy to get the VEA shuttle bus from CDG to the resort - each terminal at CDG has a VEA stop. You collect your baggage, then head for the exits. There are many direction boards on your way to the exits, showing you which exit you needs for the VEA stop. Once the VEA leaves the airport, it drops off at each of the Disney onsite hotels.
Alternatively, if there are 4 or more in your party, you might consider a private transfer, as this works out just about the same price as the VEA, and is obviously quicker, as the driver is waiting for you at your terminal for you, and takes you straight to your hotel.
In the Useful Information sticky on this forum, there are numbers etc for transfers, we used one in November, and it was great.
Elaine