[@Drache]Duly noted, no shapeshifting.

In FR, Dragons are a diverse lot. They can live pretty much anywhere where man doesn't have a settlement.

For a basic rundown of what the stereotype red dragon is, look here: http://forgottenrealms.wikia.com/wiki/Red_dragon

Generally, I'd find a hot place on the Faerun map, but you are given complete creative freedom in your backstory.