That's 100% the right way to do it and how traditional learning works (you just use a metronome and slowly work up to full tempo)
If you haven't already, please PLEASE choose the "invert" option for the string order. Your low pitched E string (the red one) should be on the bottom of the strings. It will mean that all your work will transfer immediately to both guitar tabs as well as conventional chord charts. The fact that Rocksmith is teaching people to train their muscle memory on upside down chord charts is so insane to me.