Q1: Can we start our prayer at the beginning of adhan?
A: As soon as one is certain that the time has arrived, they can start their prayer.
Q2: What is the time for maghrib and ‘isha’ prayers?
A: The special time for maghrib prayer is a few minutes after maghrib – at the time of disappearance of red rays in the east sky seen after sunset - needed to say maghrib prayer. The special time for ‘isha’ prayer is a few minutes before shar‘i midnight – here it is the mid-time between sunset and fajr adh?n - needed to say ‘isha’ prayer.