Jo - Reading your note made me smile! What a wonderful place to take your first post-injury ride---HAWAII!! You sound like you did great.
It took me a long time to recover fully from a broken shoulder, so be patient. You will get your strength and mobility back. Even though my ortho never put me in PT (a huge mistake), my shoulder is 100% thanks to my own efforts. Incorporating rotator cuff work into my weight lifting routine really has made the difference, as has stretching.