My three main difficulties were getting as much air into the meringue as possible and when to stop whisking.
Secondly how much sugar to use and do I whisk or fold it in to the egg white.
I solved these after reading 'Tips for the cook' a book my Mum had from the 1950's.
For 4 egg whites use a pinch of salt sprinkled over the whites before whisking.This helps the whites retain the air. Whisk until you can make a firm peak with the meringue.
Use 55g sugar caster is best to every egg white used. Whisk in half of the sugar then fold in the rest with a metal spoon.
My third problem was how to stop the meringue from sticking to the baking sheet whilst cooking.
This was simple, baking parchment! What would I do without it.