Replying to Left foot forwar/ Right foot forward

I am pretty new to park and can do 360s and 540s. I can do mostly every rail except kinks and S or C rails. I can do rails that go up rails that are flat and down rails. I slide left foot forward and eventually I should be able to slide both ways. I am not the best at rails so should I keep practicing left foot for ward until I'm good and then practice right foot? Or should I mix in right foot a lite and practice that while I am still practicing left foot forward. Thanks