Some basic first aid and CPR is good thing to know whether for normal times or when SHTF.
You can checkout the American Red Cross site for classes in your area.
Below are some Red Cross videos demonstrating basic first aid and CPR. Most of the videos I found were from the British Red Cross. It seemed like the American videos were mostly infomercials talking about how great the Red Cross is. You’ll notice the British videos say to call 999 instead of 911 which is the emeregncy number here in the US.
Hands only CPR: