Leonardo da Vinci might say to practice you handwriting backwards to get more comfortable. He might also say to not try to rotate your letters, but to just keep up and down. Also Leonardo would say to keep the letters at the same level.
Mirroring could be more natural for Leonardo because he was writing from right to left instead of left to right. Also facing everything backwards could be easier because your letter are backwards which could be a reflection from righting with your right hand.
A face is a reflection because if you have a line down the middle it is the same on both sides so it is a reflection.
This a a reflection of a car because everything is the same on one side and then a reflection on the other.
Tigers are a reflection because one side of their body is the same as the other side of their body.