Ok fair enough, that extra bit does make it slightly more complicated. Having said that though, I would not be fazed by this, and I don't think many UK drivers would be - because we already deal with many that have more parts. When I was learning to drive, I found a particular triple roundabout quite painful but no longer have any difficulty.
There are two skills you need to pick up to deal with any roundabout system. The first is judgement of how distant other vehicles need to be before you can enter. As a learner I used to irritate the drivers behind me by being far too cautious; on a busy roundabout you can't expect an enormous gap, so you need to know what length of gap the other drivers will expect you to take advantage of. This you can only learn from experience.
The other is to plan your route, because you need to choose your entry lane based on where you want to go. These days your navigation app will probably tell you the best entry lane.
There are two skills you need to pick up to deal with any roundabout system. The first is judgement of how distant other vehicles need to be before you can enter. As a learner I used to irritate the drivers behind me by being far too cautious; on a busy roundabout you can't expect an enormous gap, so you need to know what length of gap the other drivers will expect you to take advantage of. This you can only learn from experience.
The other is to plan your route, because you need to choose your entry lane based on where you want to go. These days your navigation app will probably tell you the best entry lane.