I was thinking about rudder usage,and for a beginner I would recommend sticking with aileron.
I use rudder on ILS, but 'use' means ' pressing ' on it very smoothly at the first sign of localizer movement. It is a smooth movement, I doubt you'll be able to capture it , even if you keep your legs on the pedals.
But , in gusty winds, or with high localizer deviations, use only roll, and correct the crab to maintain the localizer.