Of course, 7 hours is good, but to ensure the efficiency of unit time, especially listening study, you can't make a surprise, you can only get familiar with it step by step. You must ensure that you practice every day, and the rest is easy to say. Do more simulation exercises in the remaining half month, just like what you did in the exam. N 1 is not as difficult as expected. As long as you can persist and do it in the right way.

Finally, I wish you success.