If you did make a mistake by not taking the correct lane for your exit before you enter the r/a, don't correct yourself inside the roundabout by changing lanes. Instead go around the r/a once and then take your intended exit. This way you also have priority over others who are seeking to enter the r/a. Negotiating a roundabout is a definite pain for a wholesome drivers here. I though find it pretty easy once you have super command over your vehicle and quick reflexes. Keep your eyes on drivers on either side of you to make sure where they're going. Play defensive if they're cutting your lane. People do cut my lane and I too cut people's lanes. They honor my way and I honor them too accordingly. Good luck!
VERY IMPORTANT:
If you did make a mistake by not taking the correct lane for your exit before you enter the r/a, don't correct yourself inside the roundabout by changing lanes. Instead go around the r/a once and then take your intended exit. This way you also have priority over others who are seeking to enter the r/a. Negotiating a roundabout is a definite pain for a wholesome drivers here. I though find it pretty easy once you have super command over your vehicle and quick reflexes. Keep your eyes on drivers on either side of you to make sure where they're going. Play defensive if they're cutting your lane. People do cut my lane and I too cut people's lanes. They honor my way and I honor them too accordingly. Good luck!