June - There's lots of advice on the Rick Steves website and also on lonelyplanet.com (go to the Thorntree) about getting from the Charles DeGaulle airport (CDG) into Paris. The simplest is to take a taxi directly to your hotel and it will cost 45-50 Euros.
Obviously, that's also expensive. There are shuttles and airport buses which Rick explains in his book.
Public transport isn't that hard and you'll soon be an expert. From CDG you can catch the RER commuter train into Paris. Then you can transfer to the Metro to go to the stop closest to your hotel. That will cost you about 9 Euros. The Metro has a great interactive map online at www.ratp.fr.
If you post where you are staying, folks here will give you lots of suggestions for the best route. Good luck!