Hi Gurmeet,
If you planned to use stepper motor, I suggest to have a look at CNC Shield V3. I use the shield V3 as an alternative to the SatNOGS rotator controller (was recommended by my friend who also built a SatNOGS rotator). It might not have the protection as good as the SatNOGS rotator controller but it much much simpler to a beginner like me, and really cheap too. I paired it with Arduino UNO and use jumper cable so the 12V can power both the Arduino and stepper driver.
Looking forward to your build!
Adhito
YG4SLJ