It's not a requirement. you just need to have the interest to heal.

Yes, no alcohol for 24 hours post and prior. A good bath with essential oils (lavender or rose) would be great. Try sitting in a place/room that's not disturbed for an hour approximately.

Stay in your zone for the day. Read a book, do your work, etc. Refrain from engaging in verbal fights, gossip, or such types of low-vibrational activities. Be thankful and in a state of gratitude for the healing

It depends on a few factors like your age, the severity of the ailment, and how long you have been suffering from it etc. A discussion with your Coach/Healer will give you direction