If you're looking into editing services, then I know you take creative writing seriously. Have you taken a course or done a workshop on picture book writing?
Workshops are amazing, but they're expensive. I cannot recommend enough that you get this Writing Picture Books by Ann Whitford Paul, and study it with your manuscript in mind. It is well worth the investment of around $9.00!
If you're read this book, drop me a comment and let me know what you think of it!
All the best,