I am sure the coordinator has already arranged everything for you. You should be able to get more information from the coordinator too. But as a foreigner, don't trust new people you meet right away. There are people who want to take benefit from the foreigners. I was just curious because I know an orphanage where volunteers used to come and stay for some time. About 45 orphans live there. The name of the orphanage is "Morning Star Children Home." I don't who used to send the volunteers. But if you are placed there by chance, you will not have to worry about anything at all.