I am no expert. You did a fabulous job! This is always a tricky thing ...I know I felt this way when I started quilting. Because when you first start your quilting skill doesn't match up with your piecing skill( we feel this way anyway). My opinion would be that you put far to much into the quilt top it demands custom quilting.
However, we never truly know what we can do until we test ourselves. It doesn't have to be any dynamic designs....it just has to be specific designs for each area. I think you just need to pin it on start with some simple area choose a design you are comfortable with...then move on to the next area and do the same thing. It's freeing and I think you will feel good and confident by the time you are in the moment. I hope that makes sense and it's encouraging. We all know you can do this. Blessings. C