SEO Optimization Website Coder

I need someone to fully SEO-optimize my website to improve its ranking with a score of 90 or more on Google Page Speed Insight and to improve my Google Ranking. I also need Semrush, Ahrefs, and Screaming Frog SEO report problems addressed and corrected. I need someone to help with content management to find high-volume ranking keywords with low competition to improve my Google ranking.