I learned from my Mum, who taught first aid in various settings. During primary school years (until we moved when I was 9 and my sister was 7), she often took us to work, and we often had to sit quietly with a book or drawing kit, but could listen while she taught 1st aid to deaf students doing Duke of Edinburgh's Award and monitors for colony holidays. We were often used for bandaging demonstrations and practice for students. When aged about 12 years, a new family moved in a couple of doors away. It was weekend near 5th Nov, so we invited them to join us at firework display in park. The son who was the same age as me kept buying cans of pop for himself, but everyone thought he was thirsty because of long journey from their former home. After a couple of days getting sorted out after diagnosis, he appeared in my school form. He became known as a good rugby player, occasionally with scabs on face, arms, hands, legs etc from tackles or falling off his bike at speed. Perhaps hypoglycaemia sometimes played a part, but he was efficient about carrying mini Mars bars, plus some were stowed in various teachers' desks.
When doing my own DoE award, I went to Red Cross first aid course - Mum insisted we both did first aid and life saving and enjoyed shocking other parents by saying they were as important as O levels. A doctor / instructor was very clear - if person has diabetes and is acting strangely, give them sugar, as if hyper, a bit more won't make much difference, but if hypo, will cure. Obviously never give food or drink to unconscious person. This was early to mud 1980s, when home testing kits were rare.