How to whip up a small quantity of Italian meringue?
Grab a bowl, put a folded towel under it in the way the bowl becomes tilted. This will make it easy to whip, because the whites will concentrate in just one side of the bowl (thank you, gravity!); you also won`t have to use one hand to hold the bowl. With one hand free, you can pour the sugar syrup.

Jamie Oliver has a YouTube video doing some aioli this way. You just need to practice, and for me the most difficult thing is to whip it by hand without injuring your wrist.