First, I am so sorry you are going through this. Make sure to take time for yourself to deal with your own feelings and fears. It's not being selfish, it's being proactive for your daughter.
Cancer is a disease, not a death sentence.
Take it one day at a time. A sheer cliff, 1 mile high is daunting. A flat surface of 1 mile is easy to walk.
You should have no problem finding a support group in the NY area. Ask at your daughter's treatment center for suggestions. Don't be afraid to try a couple till you find one you like.
Try and take your emotion out of your research. View everything with a dose of suspicion as well as hope.
Remember that there is no magic pill, no magic diet or magic spell.
Remember to have fun with your daughter. It will help her as much as yourself.
Be careful not to let her cancer become your only reason for living. You need balance to get through this and get back to normal when she beats it.