The characteristics of this book are: low starting point, complete methods, giving you how to think and deal with plane geometry problems, and reading it well will be very rewarding. However, the difficulty is low, and it is a little difficult to get out of the exercises in the third part. The exercises in the first two parts are not particularly meaningful.

As for the difficulty of the topic, The Classic Geometry Volume of Orsay is the most suitable. You don't have to do all the exercises, just make the examples clear.