I need support to give back my old life to my son, whose arm was broken in an accident.

I need support to give back my old life to my son, whose arm was broken in an accident. My son lost his father and arm in a traffic accident 2 years ago. Therefore, he cannot go to school and needs psychological support. I also don't have enough money to buy him a prosthetic arm. We live in Los Angeles with my 2 sons. I would like to thank those who helped us in advance.