Like people already suggested... go for AMP, CDN, reduce images, css etc load. But always remember... user experience is on the top of priority. It happens many times that in an attempt to make the site load fast, we start compromising with the user experience. For example... AMP can boost the mobile loading speed like anything but many times it breaks the way of information presentation which may lead to lesser user engagement and may even provide a bad user experience. So, make sure to give first priority to the user experience. For sure... fast page loading provides better user experience but what is the use of it if user doesn't feel good about the website once it open.