PremiumPress Escort Theme Optimization

I need to optimize my website without changing the current template.

The site is escorts and it is built using PremiumPress (Escort Theme). I do not want a redesign or a new template — only performance and speed improvements.

Main objective:
Fully optimize the site to load faster, improve performance (Core Web Vitals), and remove unnecessary code without affecting the current design or functionality.

Important requirements:

Keep ALL existing content:
Pages
Blog
Model catalog (listings)
Internal theme system
DO NOT change the template or visual structure.
Everything must look exactly the same, only faster.
Technical optimization required:
Remove unused or unnecessary CSS and JavaScript
Reduce file sizes
Proper minification without breaking functionality
Fix or optimize script conflicts within the PremiumPress theme
Optimize font loading
Improve server response time
Performance optimization:
Improve speed on mobile and desktop
Optimize for Google Core Web Vitals
Reduce TTFB (Time To First Byte)
Implement proper lazy loading
Compatibility:
Maintain compatibility with LiteSpeed Cache
Maintain compatibility with Cloudflare
Do NOT break dynamic functions (login, messaging, catalog, etc.)
Technical SEO:
Ensure no 5xx server errors
Maintain proper indexing in Google
Do not affect URLs or current SEO structure

Important:
This is NOT a redesign project. This is a deep optimization of the existing PremiumPress theme, removing everything unnecessary and keeping only what is essential for maximum performance.

Expected result:
A website that looks exactly the same, but is significantly faster, more stable, and fully optimized for SEO.

Experience optimizing PremiumPress or complex JavaScript-heavy themes is a plus.