The town I grew up in had a roundabout that circled a monument, but I left it before I started driving. After college, I moved near two towns that have greenspace in the middle of the village, forcing a roundabout pattern. Locals, including tractor trailers, pass through it problem-free.
Last month, I spent a few days in Sweden with a rental. I drove more roundabouts in a day than I had driven in over 20 years of US driving, and the only time I didn't feel perfectly safe is when I couldn't clearly see the entrance to the circle on my left.
A new one is going in right now in the next town, but people are fearful. Why? Because they've not driven in them before. After two months, I bet things will be just fine.