ANSWER:
You must dedicate at least an hour a day to revise in juz’a so that you master your memorization of it. You should select the best time for you to memorise the quran, which has the least distraction. This can be after Fajr or if you do it with a teacher in the masjid, it can be after Asr.
Nothing comes easy and being a hafiz is one of the greatest achievements one can have. However, reaching the peak is easy. Maintaining it is difficult.