Building a successful page template for your WordPress site is right up my alley, as I am an experienced and skilled developer with a fondness for PHP, CSS, JS, and WordPress. As a testament to my expertise, I've already spent several years utilizing these skills to develop and design websites that perfectly catered to my clients' needs. Your project aligns harmoniously with my skill set, and I am confident in my ability to deliver the desired results promptly.
With regards to your specific requirements for this task, I have a comprehensive understanding of Advanced Custom Fields (ACF) which facilitates content organization on your website. Detail-oriented by nature, I can ensure that I will exactly match your pre-existing design to every pixel.
Additionally, I understand the integral importance of responsive designs and fluid grids through Bootstrap 5, something we'll be able to utilize effectively for your site. By keeping the number of ACF fields in mind, we'll able to effectively accommodate your content-rich site without losing aesthetic integrity or performance.
To sum up, my skills coupled with my ability to communicate in English proficiently make me an ideal candidate for this project. Let's collaborate to repurpose your existing website design using ACF and Bootstrap5 leveraging effective HTML, BS5, ACF and PHP development/coding methods. Together we can create a distinct and beautiful page that lives up to your vision.