I think it looks really good! I could just say work on the smoothing a bit and second tier down looks a little rounded. But other then that I think its great for a first time!
It looks very nice (even for someone who does wedding cakes often). It's especially good for a first time.
Congratulations on your first wedding cake!
It's really pretty, you did a fabulous job! In an up-close picture the buttercream looks good, just a little more smoothing and perfection!
Congratulations, you did a fine job. I love your hydrangeas. I agree with the others about practicing a little more to get a smoother look. Also on the top tier the border imo would have looked better just one row instead of 2. And on the bottom tier I would practice to make the swirl roses fit instead of overlapping.
Great looking cake.