Seeking feedback for my idea - an easy-to-use highlighter

Hi all, I'm about to build a new product, and wanna seek feedback from you guys, welcome to give suggestion for my idea or my landing page, here it is: https://mmntm.me/annosite This idea is inspired by some screenshot apps, which ask users to take screenshots, then annotate. I'm thinking, why not allow users to annotate first, then aks them to choose whether they want to save it or not, or they can choose to save them as images, GIFs and even notes. Any suggestion is welcomed!