I had never done a carb rebuild, either, until I did my first one.
It's not hard at all. The main thing is, you need to clean all the little passages where the fuel might flow. To do this, you need a thin wire -- like the kind you find on a loaf of break, only you need to strip the plastic or paper off of it.
Then you need some carb cleaner.
There are plenty of carb rebuilt videos on you tube. type your engine model and "carb" into google, and you should have a number of videos to choose from.
Most of the time, you can get away with just a cleaning. There are rebuilt kits out there for your specific engine, but I'd give the cleaning a go, first.
Tom