I was taught to recognize a stroke so that I could help someone on the street. And I know how to properly bandage/apply a tourniquet for fractures and bleeding and leave a note with the time when I applied the tourniquet. If there is a real situation, I'm afraid that panic and surprise will cause me to forget everything I've been taught. I carry a kit with me https://72hours.ca/collections/emergency-kit , so I don't get confused, but I'm afraid I haven't fully studied its contents and will at one point get confused or forget what can be used for what.