Topmost Priority
1. It is best to chant in front of deity of Krishna, or Tulasidevi, but better than that is to chant in front of Sri Guru.
2. Our first and foremost duty is to chant 16 rounds, minimum!
Mood of Emergency
Imagine there is a bomb in the room and you are trying to find an exit how to escape. We would try our best. Similarly we should chant our rounds in the same spirit that Maya is ready to attack, so we must try our best to surrender to Krishna.
No Limits
Actually 16 rounds is nothing. Chaitanya Mahaprabhu said 64 rounds.
Commitment
Initiation is a kind of registration.The main thing is how sincere, serious, dedicated and honest you are. If you are committed to Sri Guru & Vaishnavas, then you will surely progress in spiritual life.