WordPress Speed and Error Fix -- 2

I'm seeking an experienced WordPress developer to resolve specific errors and improve the speed of my website. The site is currently experiencing an 'order total error' and is slow to load, especially when handling images or media.

Performance issues are notably present on the homepage, product pages, and checkout process, leading to a frustrating user experience.

Key Requirements:
- Fix 'order total error'
- Enhance site speed, particularly when loading images/media
- Optimize performance of homepage, product pages, and checkout process

Ideal Skills and Experience:
- Proven experience with WordPress error resolution
- Strong understanding of site speed optimization
- Familiarity with performance issues on WooCommerce sites

Please provide a portfolio with relevant work and a brief outline of your approach.