Create a detailed website design document and proposal for complex site

I need someone to proofread a proposal that I have written that details all the functionality of a particular website. You must know how to detail the logical layout of a website and understand programming and functions. after the proposal is good, I need you to create a design document that will go further into detail about the functionality of the website. the type of website is a event ticket website that will be populated using API and also our custom marketplace for buyers and sellers.