It sounds like you should actually turn a little to the left so your right arm can extend better and not be all scrunched up. A small adjustment in proper posture can help too. Stand with feet together, make a “V” with heels together, and slide the left foot forward in the direction the toes are pointing. Feet should be about shoulder length apart and lean slightly forward on the left foot.
The right shoulder might be sore from holding the bow up When you first started playing, there are tiny muscles in the shoulder that probably have not been used very much and might be sore until they strengthen a bit more. Maybe shorten the amount of practice time or practice fewer days per week until the muscles get used to holding up the bow. There are also bow drills you can practice to build up the muscles.
Hope this helps!