Customize a Wordpress Plugin

I am developing a website that has a plugin for courses. People can see each course on a page and apply for the course directly. The plugin needs some customization that I am not able to do, since it has to go online until the 31st of December. Here you see one of the courses online: [login to view URL] I attached a screenshot of the backend and also one of the frontend with notes on what has to be changed/customized. I also attached a zip with the current plugin files for you to look at. I need this project to be done within 48 hours.