How much time do you have before you become a new owner? It sounds as if you have a lot of reading to do, so the sooner the better. A few "tips" won't be enough, so I've listed the best cham sites that most of us use. They should answer most if not all your questions and give you setup ideas. A beardie and a cham can't share the same cage. Their climatic needs are just about as opposite as any 2 herps could be and the cham would be constantly stressed by the beardie. It might even get eaten. It's hardly ever a good idea to house animals from different habitats together even if their climatic requirements were similar. Just too many unknown stressors, cross contamination problems, physical harm risks.
Anyway, here are some sites with trustworthy info for you:
http://www.chameleonnews.com
http://www.adcham.com
http://www.chameleonjournals.com
http://www.geocities.com/ccicenter
http://www.calumma.com
Good luck!