Look, roundabouts make intersections way quick if you’re not a friggin idiot.
1. As you get to one, DO NOT STOP if the way is clear.
2. If you are immediately turning right, get in to the outer lane.
3. If you are continuing on to a different turn, get in to the inner lane.
4. Check that the way is clear when exiting.
These have been around for 1.7M years (give or take), so get a clue or ride a bike.