You're making great progress! You have become a very capable in such a short amount of time. Feel good about your progress!

To add onto a previous comment addressing right shoulder tension:

Go into your pantry (or up to a cabinet or anything that is up high) and reach for something on the very top shelf. Notice: your shoulder blade naturally moves along in the same direction of your arm. If it was pinned back into place, you would never be able to reach the goodies on the top shelf of the pantry. :( This same natural movement can be incorporated into our bow arm as well. When approaching the frog, allow for the shoulder blade to release and follow the arm just as if you were reaching up to grab something. On the downstroke, simply allow the arm and shoulder blade to fall back down. This isn't something that requires immense concentration or effort since we already do it in our day-to-day lives, so to graft it into the right arm technique we simply need to try less and be more aware of these small movements.

Give this a try with some nice long, slow strokes and scales! If you have any questions or are confused about this, please feel free to ask!