I don't know about anything more than general stuff, as it is so easy to get it wrong if dealing with more complex situations.
For example the "recovery position" currently is flat on your back, wasn't when I was taught, but suffering vasa vagal episodes this is what they do.
The point about being sued is not imo correct, if helping in the belief that what you are doing is correct but it goes wrong I don't see that you could be sued.
If you pull a unconcious person out of a burning car and they have spinal injuries leaving them paralysed who's at fault ?
I was driving down the road just past my estate some years back as the school kids were all coming home, and saw something large and black fly across the road from my right to left and land on the grass, only then did I realise it was not a school bag as I had thought but a 14 year old girl, Charlotte ***
She had run out in front of a car and been hit at about 30mph, throwing her into the air and landing face down sliding to a halt on the grass verge, luckily not the road.
There were two cars in front of me that stopped, and then I saw some moron trying to pick her up, she was totally unconcious I shouted as loud as I could to ****ing leave her alone, and rushed over to her, she was breathing ok, checked her neck pulse as her arm was obviously broken, other arm was underneath her, asked people to call 112 in case they hadn't, important this 112 will go to the nearest mobile reception regardless of network, so in poor reception areas it helps a lot.
I waited around 8-10 mins while paramedic arrived, plod were there, I was physically preventing her from getting up by my arm very gently across her shoulder blades, while she was by this time calling me some things I had not heard before, and her friends and friends mother trying to "free" her to the point that I had to threaten them physically to leave her alone.
Anyway she was taken away in air ambulance, paramedic(Neal Porter) said I did exactly right, and told the friends/mother that had she got up with her injuries she wouldn't be walking now.
I also covered her with a jacket from a parent, kids were asking is she going to die!!, amazingly her parents who were away on a "horsey" event in the us didn't even return to the uk.
I think a lot is common sense, or maybe I'm just a saddo that watches too much ER etc!!
I firmly believe first aid and drivers ed should be school subjects.
tabetha