I am not sure where to start, I'm trying to build a gantry robot and my friend found a linear actuator, that comes with NEMA 23 stepper motors: https://openbuildspartstore.com/nema-23-stepper-motor-high-torque-series/

In order to control it I need a motor driver to interface with the motor and the Arduino Uno, but I don't know where to start on picking the right one. So if some one could help me, that'd help a lot! Thanks in advance!

 

Look up Gecko site, they manuf stepper drivers and have on line selection help on the web site and also by email support.
Also the selection of the right power supply.
Do you intend 2 axis interpolated moves with the gantry?
Max.