Not the one on TV when we were kids but the one in Swindon. If you have never had the good/bad fortune to visit Swindon to see this phenomenon then it is one large roundabouts with a mini-roundabout at each entrance/exit.
If anybody were to show you a picture it looks quite intimidating.
But, in reality, it is quite simple as you only have to negotiate one mini-roundabout at a time.
How often are we put off doing something because we think it is difficult or complicated? Just break things down and do one step at a time.