You can make a difference. When watching terrible situations like the war in Ukraine, we want to help. However, we are often overwhelmed by the options and end up doing something useless. Charities are drowning in used overcoats and donated toys that there is no way to get to Ukraine.
Unless you have personal contacts in a disaster area, donate money to an organization you already know, like your church or the International Red Cross. Money can be used for whatever is necessary, and the brave people on the ground know if the highest need is for food, medicine, shelter, or transportation.
Making a donation you know will be useful is the best way to fight your anxiety about the state of the world.