Welcome, Lori! You've styled this wonderful dress superbly. I only have one suggestion for "tweaking." Check the archives for the sleeve scrunch technique that Angie wears so beautifully. I think the jacket would look terrific with scrunched sleeves, as long as you're not too cold!
P.S. I use my phone for photos, too. I have an camera app that has a self timer, and I prop in up on my piano against a decorative box or use my music stand at work. I'd love to have a tripod!