The submission done earlier stands for the first course (Foundation of User Experience) so click on course 2 (Empathy, Ideate). Follow the same process to apply.
Repeat the process for courses 3 to 7
After each application, you should receive a mail on the expected date of approval but ensure you apply for all the seven courses under Google UX design
Hint: If you're a student, to meet the 150 words reasons in the application, you can add your course of study, ASUU strike, and how you want to use that strike to go into the tech world