Nothing with with that gearset. Just ride it and have fun. Later, you can tweak it to preference.
You just need another set of tires or another wheelset with treaded tires to ride dirt roads.
I think you'll be more happy and more comfortable on that Surly than the Performance road stinker.
PoP, the CA powder coater is SyCip,
http://sycip.com and the Pelicanite is jtkkz.