Auto-electrics are a little specialised. General electronics knowledge will probably allow us to cover most of the basics, but almost certainly not all.
Teaching safety is an area where you don't want to make mistakes (even by omission).
I would seek out someone qualified to teach auto electronics and get them to cover this in some detail with you. You may learn very little, but at least you can be confident that what you will learn will come from someone qualified in the particular field.
I googled "jump starting a car safety" and found several references that suggest your method but contain several precautions that we have not suggested (including to beware of frozen batteries).
Teaching safety is an area where you don't want to make mistakes (even by omission).
I would seek out someone qualified to teach auto electronics and get them to cover this in some detail with you. You may learn very little, but at least you can be confident that what you will learn will come from someone qualified in the particular field.
I googled "jump starting a car safety" and found several references that suggest your method but contain several precautions that we have not suggested (including to beware of frozen batteries).