How to write a missionary or humanitarium introduction letter?

Going on a missionary trip to India within a month

Will conduct feeding program for very poor and will give medical supplies, eyeglasses, bookbags for kids, sandals all sizes and new clothes for infants

Will teach kids and have seminars for adults

Is this letter an appeal for funding for this trip? To whom will it be sent?

Agree, what is the use of the letter? Are you sending it to people in nations you will be working? Are you going as part of a larger international group?

Are you sending out letters asking for funding?

Also, if you are going within a month, I would have hoped you already have every detail of funding and supplies finished