You can take a Free Trial of more than one course.
There you can choose the Entrance Exam again (JEE Mains in this case). Then, choose the target year. After choosing the target year, choose the course type and the course.
At any given point, only one free trial course will show up on your dashboard. If you wish to take take the trial of multiple courses, you may select them one by one.
You will be able to prepare using the smart study notes, practice questions and take tests that are available in the free trial by way of sample.
Please follow the steps for selecting a course for a free trial.