As a seasoned digital marketer and experienced web developer not only do I possess a robust background in WordPress, but my broad spectrum of skills, including HTML, PHP, and Web Security, make me an ideal candidate to take care of your project. I've successfully installed SSL certificates on countless websites before, employing the most suitable ones tailored for the specific needs of each client. In your case, it's all about providing a secure browsing experience and eliminating security warnings - I've got you covered.
Moreover, with my strong knowledge base in WordPress plugins including the Really Simple Security plugin, I assure you that not only will I update it to its latest version, but also customize it optimally for enhanced website security. Plus in my years of practice as a freelancer communication has been key to transparent and successful collaborations. You can expect nothing less from me: regular updates on the task's progress and clear professional exchanges keeping you informed every step of the way.