Hi, based on your description, I see you are looking for a developer who can start your project right away.
I am a senior web developer with extensive development background. I have more than 9 years of development experience and in-depth skills in Website Design development and scripting languages such as PHP, MySQL, HTML, CSS, JavaScript, jQuery, WordPress, Woo-commerce and WordPress plugins and search engine optimization (SEO).
Please send me a message to discuss more about this project.
I would be happy to help you on this project "I need to build a website. But it must be based on an existing website that you are familiar with!" and future ones. :)
Thanks & Regards