Well that SparkFun breakout op amp module you linked to won't work for your application because it is an AC amplifier using capacitors for input and inter-stage coupling. You will require DC coupling for work with a strain gauge. Goggle on instrumentation op-amps and you should find various application information and circuit examples on interfacing with resistive bridge type sensors. The type of op-amp to use is not as important as the circuit you surround it with for simple DC applications. Simple op-amps can be wired to use differential input.
Lefty