Childrens book

I've just written a childrens book, but I'm not sure what age group, it will 'NOW' be targeting, because initially it was created for nurseries, but now its turned longer, because I've introduced a new concept of how children can look at a 'present' differently.

Looking for someone who is musical creative and thinks outside the book, with childrens book and has experience, successive with childrens narrative and is knowledgeable with languages for different age group,

I want the person who comes on board, to make it 'ready' for the childrens book to be published. I really admire julia Donaldsons narrative, so looking for someone who can give it that feel and make it the same standard ir beyond. I feel this childrens book, has alot of potential.

I just need help to Perfect it;

1) Using the right language for the age targeted
2) Writing out the music for the book (how to write out the drum beat and does it need a professional music transcript at the end, )
3) Using the right, rhyming words for the concept 'present' - has the story been structured in a way, that the story builds a picture for the concept, is there suspense, is there a pattern, in the story - that children can follow, does the story flow and come together at the end
4) Punctuation, grammar, spellings
5) Is the blurb okay?
6) Also, what kind of illustrations can be on each page, to go with each section

In summary - I need to perfect it, so it's ready for publishing and the content to have a creative delivery for the concept of 'present' and using the right words to bring the concept of 'present alive'

Thank you and look forward to hearing from you

Once that is done, help on what do I do next?