Welcome and congrats on your new baby!
Roxie was my first dog too. I agree that you should do tons of research now, before you bring Denim home. I got Roxie on a spur of the moment, and was researching Yorkies *while* trying to get accustomed to having a dog in the house. It wasn't easy. I am thankful everyday for this website...I may not have survived the first few weeks without it!
So definitely read around...this is a terrific place for info!