First off, congratulations on your acceptance. Second, get through the DPT program. While in the DPT program, you will be able to cross off potential areas (ortho, peds, neuro, acute, SNF, rural, urban, etc) that you will have no real interest in practicing as a DPT. Once that is complete, decide if you are willing to spend another 1-2 years (most full-time residencies are a year and some some hybrid programs that do on-site and web-enhanced classes can be 18 months) learning at a more in-depth level in an area you identified above. If you still want to do a residency, go for it!
From personal experience, I followed the money after PT school and ended up in a SNF. I loved the patients but hated the constant drive for higher RUG (treat patients for longer) at the expense of the patient. While in the SNF, I took some manual classes working toward a certification as I was really drawn to OP ortho with manual emphasis in grad school. I soon realized I wanted to do a residency, even after being out of school for three years, because I wanted to better my clinical reasoning, interact with mentors, and work towards fellowship training.
You'll graduate as a general PT with a basic skill set that will get you by in whatever area you decide to work. If you want to specialize, do a residency. I'm in a hybrid program, however, if I had just graduated I probably would have done a full-time year-long residency looking back.
Hope this helps.
