Learning the unspoken rules of introduction etiquette is a useful social skill. Knowing how to introduce yourself or how to introduce others puts you and others at social ease. A great introduction can be the start of a rewarding friendship. Making a good introduction leaves a favourable impression on others.
You are probably already practising the right way to make introductions without knowing it. As these are general guidelines, don't worry about making small mistakes. Most people will overlook them or not even realize your blunder.