Here we have sone easy learner roundabouts, the smallest one i have seen is 2 M i diameter ( the mittle part you are suposed to turn around )
So small i did not bother going around it in the 4x4 i had, drove it like a ordenary intersection with no lights and cut across the mittle.
On the other hand we allso have large 2 lane roundabouts witch mostly connect to single lane roads, allso they have a large mittle, some with bushes or even a art installation.
Some times you can see tracks up the mittle of the roundabout where some dumbass on the phone have launched his car
Some centers of roundabouts can be a couple of Meters tall, so there should be room for a Little evil kenivel imitation.
Not the smallest one, but they invite to " i just dont give a f..k" driving.
If you dont feel like you can exit a roundabout safe, just take another trip around it as there is no extra charge