How can I go to palistine and help the wounded?

I'm a care assistant in an old peoples home and i think that my experience of the care of the people there could be put to good use abroad in a place such as Palestine (or where ever there is a humanitarian crisis) that need people to work in the hospitals there to dress wounds, wash people, apply first aid, assist nurses etc. I would not mind paying to get there, sooo...

1) What organisations do this? (if any)

2) Should I start saving, and if so how much?

Remember, I'll go anywhere!

Thanks very much!