There's nothing better than going as a passenger with someone else who's more used to R/T than you. You'll learn far more when you've nothing to do, than when you are trying to fly, navigate and communicate at the same time.
Also, if you go flying with your friend again, it can be useful to let just one of you do the r/t while the other flies and navigates.
With the extra free brain capacity, you'll pick up the bits your missing much quicker, and improve much faster.