Google Rankings Drop Technical Audit

My Search Console graphs nosedived in early July even though I made no design, URL, or hosting changes. Website visits from Google are down across almost every page, so I need a sharp, data-driven pair of eyes on the site... (Budget: ₹3000 - ₹5000 INR, Jobs: Data Analysis, Google Analytics, Internet Marketing, PHP, SEMrush, SEO, Website Audit)