Full Hifz of the Quran typically takes 2 to 5 years depending on class frequency, age, and how much time is dedicated to daily revision.
Absolutely. Adults often have stronger discipline and motivation. The approach is adjusted to suit adult learning styles and schedules.
Beginners typically memorize half a page to one page per day. As the student builds strength, the rate can increase. Revision is just as important as new memorization.