Full-Stack Developer Needed for Car rental Website Updates, Backend Revisions & Ongoing Support

I’m looking for a reliable full-stack developer to provide ongoing support for my existing car rental website, carsnextgen.com, and its reservation dashboard. The website is fully functioning, but I need several improvements: - Correct after-hours fees so pickup and return are charged independently. - Add a “send now” button for pickup instruction emails alongside the existing scheduled email. - Add a discount/promo code option at checkout. - Improve email validation to catch invalid addresses and common typos, with an option to verify customers’ email addresses. Other tasks may include updating prices, adding pages or blog posts, and improving dashboard features. I also need help securing full access to the website’s code, hosting, and related accounts, with clear explanations for someone without a technical background.