If this is all too overwhelming to look at alone, contact your publishing guide. They specialize in helping determine what services you need, will coordinate with your service providers for you, and will handle organizing your team. You don’t need to do it all yourself.
If you want to do it yourself, you’re more than welcome to retain that control, and your guide will take a back seat and introduce you to service providers we work with to help you build the team that best fits your book.