Proofread, spelling and grammer, editing my first self help book

I hope this message will get to you in a good health, i am looking for someone with skills as this is my first book and with amazing experience as I need someone who can work with me as if i need to add more information or change it in different way i am open minded as this is my best seller and i want it to make a mark with this first book and i am acting up like first time mother without any skills or education for it.
thank you
Barke