Welcome to my Gig.
I would undergo the following process for your task.
1. Use a Checklist: Generate a list of fundamental things to check for such as problem areas like agreement of nouns and verbs and of pronouns and antecedents, and number style.
2. Fact-check: Double-check facts, figures, and proper names. If information remains to be inserted at the last minute, highlight the omission prominently so that no one forgets to do so.
3. Spell check: Before proofreading a printout, spell-check the electronic version to find misspellings, as well as errors you or a colleague make frequently, like omitting a closing parenthesis or quotation mark.
4. Attend to Format: Proofreading isn’t only just about reviewing the text. Make sure that the document design adheres to established specifications. Check page numbering, column alignment, relative fonts, sizes, and other features of standard elements like headlines, subheadings, captions, and footnotes. Inspect each type of feature within categories such as looking at every headline then every caption and so on.